diff --git a/.github/workflows/auto-clang-format.yml b/.github/workflows/auto-clang-format.yml
index 0ffea8d2..a6ea16dc 100644
--- a/.github/workflows/auto-clang-format.yml
+++ b/.github/workflows/auto-clang-format.yml
@@ -8,8 +8,9 @@ jobs:
     steps:
     - uses: actions/checkout@v6
       with:
-        ref: ${{ github.head_ref || github.ref_name }}
-        fetch-depth: 0    
+        repository: ${{ github.event.pull_request.head.repo.full_name }}
+        ref: ${{ github.event.pull_request.head.ref }}
+        fetch-depth: 0
     - uses: DoozyX/clang-format-lint-action@v0.20
       with:
         source: '.'