diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 978132e408..676a24ce2b 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -16,7 +16,12 @@ jobs:
       matrix:
         operating-system: ['ubuntu-20.04']
     steps:
+      - name: Set branch name
+        id: vars
+        run: echo ::set-output name=branch::${{ github.ref == 'refs/heads/gd' && 'gd' || 'master' }}
       - uses: actions/checkout@v3
+        with:
+          ref: ${{ steps.vars.outputs.branch }}
       - name: Run with setup-python 3.11
         uses: actions/setup-python@v4
         with: