diff --git a/.github/workflows/ai_pr_title_review.yml b/.github/workflows/ai_pr_title_review.yml
index 6612e2966..9dc4ebefa 100644
--- a/.github/workflows/ai_pr_title_review.yml
+++ b/.github/workflows/ai_pr_title_review.yml
@@ -22,7 +22,11 @@ jobs:
         with:
           egress-policy: audit
 
-      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - name: Checkout code
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        with:
+          ref: ${{ github.event.pull_request.base.ref }}
+          fetch-depth: 1
 
       - name: Configure Git to suppress detached HEAD warning
         run: git config --global advice.detachedHead false