Fix ref

Author: lucasssvaz

.github/workflows/pre-commit.yml

@@ -48,7 +48,7 @@ jobs:
           max_wait: 5
           interval: 30
           timeout: 7
-          ref: ${{ github.event.pull_request.head.sha || github.sha }}
+          ref: ${{ github.event.pull_request.head.ref || github.ref }}
           verbose: true
 
       - name: Download compilation artifacts