diff --git a/.github/workflows/pinact.yaml b/.github/workflows/pinact.yaml
index 8072ee89..882f339e 100644
--- a/.github/workflows/pinact.yaml
+++ b/.github/workflows/pinact.yaml
@@ -15,6 +15,7 @@ jobs:
     steps:
       - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
         with:
+          ref: ${{ github.head_ref }}
           persist-credentials: false
       - uses: suzuki-shunsuke/pinact-action@cf51507d80d4d6522a07348e3d58790290eaf0b6 # v2.0.0
         with: