diff --git a/cli/src/git_util.rs b/cli/src/git_util.rs
index 252a93e6ab..c3730b7475 100644
--- a/cli/src/git_util.rs
+++ b/cli/src/git_util.rs
@@ -17,7 +17,6 @@
 use std::io::{Read, Write};
 use std::path::{Path, PathBuf};
 use std::process::Stdio;
-use std::sync::Mutex;
 use std::time::Instant;
 use std::{error, iter};
 
@@ -60,11 +59,11 @@ pub fn is_colocated_git_workspace(workspace: &Workspace, repo: &ReadonlyRepo) ->
     git_workdir.canonicalize().ok().as_deref() == dot_git_path.parent()
 }
 
-fn terminal_get_username(ui: &mut Ui, url: &str) -> Option<String> {
+fn terminal_get_username(ui: &Ui, url: &str) -> Option<String> {
     ui.prompt(&format!("Username for {url}")).ok()
 }
 
-fn terminal_get_pw(ui: &mut Ui, url: &str) -> Option<String> {
+fn terminal_get_pw(ui: &Ui, url: &str) -> Option<String> {
     ui.prompt_password(&format!("Passphrase for {url}: ")).ok()
 }
 
@@ -138,13 +137,9 @@ fn get_ssh_keys(_username: &str) -> Vec<PathBuf> {
     paths
 }
 
-pub fn with_remote_git_callbacks<T>(
-    ui: &mut Ui,
-    f: impl FnOnce(git::RemoteCallbacks<'_>) -> T,
-) -> T {
-    let mut ui = Mutex::new(ui);
+pub fn with_remote_git_callbacks<T>(ui: &Ui, f: impl FnOnce(git::RemoteCallbacks<'_>) -> T) -> T {
     let mut callback = None;
-    if let Some(mut output) = ui.get_mut().unwrap().progress_output() {
+    if let Some(mut output) = ui.progress_output() {
         let mut progress = Progress::new(Instant::now());
         callback = Some(move |x: &git::Progress| {
             _ = progress.update(Instant::now(), x, &mut output);
@@ -156,14 +151,11 @@ pub fn with_remote_git_callbacks<T>(
         .map(|x| x as &mut dyn FnMut(&git::Progress));
     let mut get_ssh_keys = get_ssh_keys; // Coerce to unit fn type
     callbacks.get_ssh_keys = Some(&mut get_ssh_keys);
-    let mut get_pw = |url: &str, _username: &str| {
-        pinentry_get_pw(url).or_else(|| terminal_get_pw(*ui.lock().unwrap(), url))
-    };
+    let mut get_pw =
+        |url: &str, _username: &str| pinentry_get_pw(url).or_else(|| terminal_get_pw(ui, url));
     callbacks.get_password = Some(&mut get_pw);
-    let mut get_user_pw = |url: &str| {
-        let ui = &mut *ui.lock().unwrap();
-        Some((terminal_get_username(ui, url)?, terminal_get_pw(ui, url)?))
-    };
+    let mut get_user_pw =
+        |url: &str| Some((terminal_get_username(ui, url)?, terminal_get_pw(ui, url)?));
     callbacks.get_username_password = Some(&mut get_user_pw);
     f(callbacks)
 }
diff --git a/cli/src/ui.rs b/cli/src/ui.rs
index 3f857bdc32..87d8db9791 100644
--- a/cli/src/ui.rs
+++ b/cli/src/ui.rs
@@ -415,7 +415,7 @@ impl Ui {
                 .unwrap_or(false)
     }
 
-    pub fn prompt(&mut self, prompt: &str) -> io::Result<String> {
+    pub fn prompt(&self, prompt: &str) -> io::Result<String> {
         if !Self::can_prompt() {
             return Err(io::Error::new(
                 io::ErrorKind::Unsupported,
@@ -441,7 +441,7 @@ impl Ui {
 
     /// Repeat the given prompt until the input is one of the specified choices.
     pub fn prompt_choice(
-        &mut self,
+        &self,
         prompt: &str,
         choices: &[impl AsRef<str>],
         default: Option<&str>,
@@ -470,7 +470,7 @@ impl Ui {
     }
 
     /// Prompts for a yes-or-no response, with yes = true and no = false.
-    pub fn prompt_yes_no(&mut self, prompt: &str, default: Option<bool>) -> io::Result<bool> {
+    pub fn prompt_yes_no(&self, prompt: &str, default: Option<bool>) -> io::Result<bool> {
         let default_str = match &default {
             Some(true) => "(Yn)",
             Some(false) => "(yN)",
@@ -486,7 +486,7 @@ impl Ui {
         Ok(choice.starts_with(['y', 'Y']))
     }
 
-    pub fn prompt_password(&mut self, prompt: &str) -> io::Result<String> {
+    pub fn prompt_password(&self, prompt: &str) -> io::Result<String> {
         if !io::stdout().is_terminal() {
             return Err(io::Error::new(
                 io::ErrorKind::Unsupported,