diff --git a/nixpkgs_review/report.py b/nixpkgs_review/report.py
index 12b7766..d29ddd0 100644
--- a/nixpkgs_review/report.py
+++ b/nixpkgs_review/report.py
@@ -3,6 +3,7 @@
 import subprocess
 from collections.abc import Callable
 from pathlib import Path
+from typing import Literal
 
 from .nix import Attr
 from .utils import info, link, warn
@@ -90,10 +91,12 @@ def write_error_logs(attrs: list[Attr], directory: Path) -> None:
 
 class Report:
     def __init__(
-        self, system: str, attrs: list[Attr], extra_nixpkgs_config: str
+        self, system: str, attrs: list[Attr], extra_nixpkgs_config: str, *,
+        checkout: Literal["merge", "commit"] = "merge",
     ) -> None:
         self.system = system
         self.attrs = attrs
+        self.checkout = checkout
         self.broken: list[Attr] = []
         self.failed: list[Attr] = []
         self.non_existent: list[Attr] = []
@@ -144,6 +147,7 @@ def serialize_attrs(attrs: list[Attr]) -> list[str]:
             {
                 "system": self.system,
                 "pr": pr,
+                "checkout": self.checkout,
                 "extra-nixpkgs-config": self.extra_nixpkgs_config,
                 "broken": serialize_attrs(self.broken),
                 "non-existent": serialize_attrs(self.non_existent),
@@ -162,6 +166,8 @@ def markdown(self, pr: int | None) -> str:
             cmd += f" pr {pr}"
         if self.extra_nixpkgs_config:
             cmd += f" --extra-nixpkgs-config '{self.extra_nixpkgs_config}'"
+        if self.checkout != "merge":
+            cmd += f" --checkout {self.checkout}"
 
         msg = f"Result of `{cmd}` run on {self.system} [1](https://github.com/Mic92/nixpkgs-review)\n"
 
diff --git a/nixpkgs_review/review.py b/nixpkgs_review/review.py
index 84e72f2..a5754f4 100644
--- a/nixpkgs_review/review.py
+++ b/nixpkgs_review/review.py
@@ -272,7 +272,7 @@ def start_review(
         os.environ["NIXPKGS_REVIEW_ROOT"] = str(path)
         if pr:
             os.environ["PR"] = str(pr)
-        report = Report(self.system, attr, self.extra_nixpkgs_config)
+        report = Report(self.system, attr, self.extra_nixpkgs_config, checkout=self.checkout.name.lower())
         report.print_console(pr)
         report.write(path, pr)