diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index d287af2..131ee4c 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -15,7 +15,6 @@ jobs:
       - uses: actions/checkout@v2
         with:
           fetch-depth: 1
-          ref: refs/remotes/pull/${{ github.event.number }}/merge
 
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v2