diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index c5db8ce..0305f18 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -32,7 +32,7 @@ jobs:
       - uses: haya14busa/action-workflow_run-status@967ed83efa565c257675ed70cfe5231f062ddd94
       - uses: actions/checkout@v3
         with:
-          ref: ${{ github.event.workflow_run.head_branch }}
+          ref: ${{ github.event.workflow_run.head_sha }}
       - name: Cache
         uses: actions/cache@v3
         with: