diff --git a/dist/index.js b/dist/index.js
index bca7be4f41..bc0bfac20c 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -184,7 +184,7 @@ function createOrUpdateBranch(git, commitMessage, base, branch, branchRemoteName
         if (workingBase != base) {
             core.info(`Rebasing commits made to ${workingBaseType} '${workingBase}' on to base branch '${base}'`);
             // Checkout the actual base
-            yield git.fetch([`${base}:${base}`], baseRemote, ['--force']);
+            yield git.fetch([`${base}:${base}`], baseRemote, ['--force', '--depth=1']);
             yield git.checkout(base);
             // Cherrypick commits from the temporary branch starting from the working base
             const commits = yield git.revList([`${workingBase}..${tempBranch}`, '.'], ['--reverse']);
@@ -197,7 +197,7 @@ function createOrUpdateBranch(git, commitMessage, base, branch, branchRemoteName
             // Reset the temp branch to the working index
             yield git.checkout(tempBranch, 'HEAD');
             // Reset the base
-            yield git.fetch([`${base}:${base}`], baseRemote, ['--force']);
+            yield git.fetch([`${base}:${base}`], baseRemote, ['--force', '--depth=1']);
         }
         // Try to fetch the pull request branch
         if (!(yield tryFetch(git, branchRemoteName, branch))) {
diff --git a/src/create-or-update-branch.ts b/src/create-or-update-branch.ts
index 1c55ea5fcc..b048d5db9d 100644
--- a/src/create-or-update-branch.ts
+++ b/src/create-or-update-branch.ts
@@ -200,7 +200,7 @@ export async function createOrUpdateBranch(
       `Rebasing commits made to ${workingBaseType} '${workingBase}' on to base branch '${base}'`
     )
     // Checkout the actual base
-    await git.fetch([`${base}:${base}`], baseRemote, ['--force'])
+    await git.fetch([`${base}:${base}`], baseRemote, ['--force', '--depth=1'])
     await git.checkout(base)
     // Cherrypick commits from the temporary branch starting from the working base
     const commits = await git.revList(
@@ -219,7 +219,7 @@ export async function createOrUpdateBranch(
     // Reset the temp branch to the working index
     await git.checkout(tempBranch, 'HEAD')
     // Reset the base
-    await git.fetch([`${base}:${base}`], baseRemote, ['--force'])
+    await git.fetch([`${base}:${base}`], baseRemote, ['--force', '--depth=1'])
   }
 
   // Try to fetch the pull request branch