diff --git a/.github/workflows/benchmark.yml b/.github/workflows/benchmark.yml
index 1db841951..cb50ce702 100644
--- a/.github/workflows/benchmark.yml
+++ b/.github/workflows/benchmark.yml
@@ -47,7 +47,7 @@ jobs:
       - name: Checkout PR branch code
         uses: actions/checkout@v2
         with:
-          ref: ${{ github.event.pull_request.head.ref }}
+          fetch-depth: 0
 
       - name: Get PR branch commit ID
         id: get_pr_commit