diff --git a/tools/digger-core/src/main/kotlin/com/zegreatrob/tools/digger/core/AllContributionCommits.kt b/tools/digger-core/src/main/kotlin/com/zegreatrob/tools/digger/core/AllContributionCommits.kt
index 60cd856..c7f088a 100644
--- a/tools/digger-core/src/main/kotlin/com/zegreatrob/tools/digger/core/AllContributionCommits.kt
+++ b/tools/digger-core/src/main/kotlin/com/zegreatrob/tools/digger/core/AllContributionCommits.kt
@@ -2,10 +2,9 @@ package com.zegreatrob.tools.digger.core
 
 import org.ajoberstar.grgit.Commit
 import org.ajoberstar.grgit.Grgit
-import java.io.File
 
-fun Grgit.allContributionCommits(workingDirectory: File): List<Pair<TagRef?, List<Commit>>> {
-    val tagList = listTags(workingDirectory)
+fun Grgit.allContributionCommits(gitDigger: DiggerGitWrapper): List<Pair<TagRef?, List<Commit>>> {
+    val tagList = gitDigger.listTags()
     return log().fold(emptyList()) { acc, commit ->
         val tag = tagList.find { it.commitId == commit.id }
         if (tag != null) {
diff --git a/tools/digger-core/src/main/kotlin/com/zegreatrob/tools/digger/core/TagRef.kt b/tools/digger-core/src/main/kotlin/com/zegreatrob/tools/digger/core/TagRef.kt
index dfc3ed7..7dc935a 100644
--- a/tools/digger-core/src/main/kotlin/com/zegreatrob/tools/digger/core/TagRef.kt
+++ b/tools/digger-core/src/main/kotlin/com/zegreatrob/tools/digger/core/TagRef.kt
@@ -4,9 +4,9 @@ import kotlinx.datetime.Instant
 import java.io.File
 import java.nio.charset.Charset
 
-fun currentCommitTag(workingDirectory: File): TagRef? {
-    val firstTag = listTags(workingDirectory).maxByOrNull { it.dateTime }
-    val headCommitId = headCommitId(workingDirectory)
+fun DiggerGitWrapper.currentCommitTag(): TagRef? {
+    val firstTag = listTags().maxByOrNull { it.dateTime }
+    val headCommitId = headCommitId()
     return if (firstTag?.commitId != headCommitId) {
         null
     } else {
@@ -14,59 +14,62 @@ fun currentCommitTag(workingDirectory: File): TagRef? {
     }
 }
 
-fun headCommitId(workingDirectory: File): String {
-    val process =
-        ProcessBuilder(
-            listOf(
-                "git",
-                "--no-pager",
-                "rev-parse",
-                "HEAD",
-            ),
-        )
-            .directory(workingDirectory)
-            .start()
-    val outputText = process.inputStream.readAllBytes().toString(Charset.defaultCharset())
-    val error = process.errorStream.readAllBytes().toString(Charset.defaultCharset())
-    process.waitFor()
-    if (error.isNotEmpty()) {
-        throw Error(error)
-    }
-    return outputText.trim()
-}
+class DiggerGitWrapper(private val workingDirectory: File) {
 
-fun listTags(workingDirectory: File): List<TagRef> {
-    val process =
-        ProcessBuilder(
-            listOf(
-                "git",
-                "--no-pager",
-                "tag",
-                "--list",
-                "--format=%(refname:strip=2),%(*objectname),%(creatordate:iso-strict)",
-            ),
-        )
-            .directory(workingDirectory)
-            .start()
-    val outputText = process.inputStream.readAllBytes().toString(Charset.defaultCharset())
-    val error = process.errorStream.readAllBytes().toString(Charset.defaultCharset())
-    process.waitFor()
-    val output = outputText.split("\n").mapNotNull {
-        val commaSplit = it.split(",")
-        if (commaSplit.size >= 3) {
-            TagRef(
-                name = commaSplit.subList(0, commaSplit.size - 2).joinToString(""),
-                commitId = commaSplit.reversed()[1],
-                dateTime = Instant.parse(commaSplit.last()),
+    fun headCommitId(): String {
+        val process =
+            ProcessBuilder(
+                listOf(
+                    "git",
+                    "--no-pager",
+                    "rev-parse",
+                    "HEAD",
+                ),
             )
-        } else {
-            null
+                .directory(workingDirectory)
+                .start()
+        val outputText = process.inputStream.readAllBytes().toString(Charset.defaultCharset())
+        val error = process.errorStream.readAllBytes().toString(Charset.defaultCharset())
+        process.waitFor()
+        if (error.isNotEmpty()) {
+            throw Error(error)
         }
+        return outputText.trim()
     }
-    if (error.isNotEmpty()) {
-        throw Error(error)
+
+    fun listTags(): List<TagRef> {
+        val process =
+            ProcessBuilder(
+                listOf(
+                    "git",
+                    "--no-pager",
+                    "tag",
+                    "--list",
+                    "--format=%(refname:strip=2),%(*objectname),%(creatordate:iso-strict)",
+                ),
+            )
+                .directory(workingDirectory)
+                .start()
+        val outputText = process.inputStream.readAllBytes().toString(Charset.defaultCharset())
+        val error = process.errorStream.readAllBytes().toString(Charset.defaultCharset())
+        process.waitFor()
+        val output = outputText.split("\n").mapNotNull {
+            val commaSplit = it.split(",")
+            if (commaSplit.size >= 3) {
+                TagRef(
+                    name = commaSplit.subList(0, commaSplit.size - 2).joinToString(""),
+                    commitId = commaSplit.reversed()[1],
+                    dateTime = Instant.parse(commaSplit.last()),
+                )
+            } else {
+                null
+            }
+        }
+        if (error.isNotEmpty()) {
+            throw Error(error)
+        }
+        return output
     }
-    return output
 }
 
 data class TagRef(val name: String, val commitId: String, val dateTime: Instant)
diff --git a/tools/digger-plugin/src/main/kotlin/com/zegreatrob/tools/digger/DiggerExtension.kt b/tools/digger-plugin/src/main/kotlin/com/zegreatrob/tools/digger/DiggerExtension.kt
index d6169e9..b748256 100644
--- a/tools/digger-plugin/src/main/kotlin/com/zegreatrob/tools/digger/DiggerExtension.kt
+++ b/tools/digger-plugin/src/main/kotlin/com/zegreatrob/tools/digger/DiggerExtension.kt
@@ -1,5 +1,6 @@
 package com.zegreatrob.tools.digger
 
+import com.zegreatrob.tools.digger.core.DiggerGitWrapper
 import com.zegreatrob.tools.digger.core.TagRef
 import com.zegreatrob.tools.digger.core.allContributionCommits
 import com.zegreatrob.tools.digger.core.contribution
@@ -10,6 +11,7 @@ import org.ajoberstar.grgit.gradle.GrgitServiceExtension
 import org.gradle.api.model.ObjectFactory
 import org.gradle.api.tasks.Input
 import org.gradle.kotlin.dsl.property
+import org.gradle.kotlin.dsl.provideDelegate
 import java.io.File
 
 open class DiggerExtension(
@@ -22,15 +24,17 @@ open class DiggerExtension(
     @Input
     var workingDirectory = objectFactory.property<File>()
 
+    private val gitDigger by lazy { DiggerGitWrapper(workingDirectory.get()) }
+
     fun allContributionData() =
         grgitServiceExtension.service.get().grgit
-            .allContributionCommits(workingDirectory.get())
+            .allContributionCommits(gitDigger)
             .map { range -> range.first to range.second.toList().contribution() }
             .map { (tag, contributions) -> contributions.copyWithLabelAndTag(tag) }
 
     fun currentContributionData() =
         with(grgitServiceExtension.service.get().grgit) {
-            val currentCommitTag = currentCommitTag(workingDirectory.get())
+            val currentCommitTag = gitDigger.currentCommitTag()
             currentContributionCommits()
                 .contribution()
                 .copyWithLabelAndTag(currentCommitTag)