diff --git a/.github/workflows/pre-commit.yaml b/.github/workflows/pre-commit.yaml
index 9672e077f..07241d1a0 100644
--- a/.github/workflows/pre-commit.yaml
+++ b/.github/workflows/pre-commit.yaml
@@ -25,6 +25,7 @@ jobs:
     - uses: actions/checkout@v2
       with:
         fetch-depth: 0
+        ref: ${{ github.event.pull_request.head.sha }}
 
     - uses: actions/setup-python@v2
       with: