diff --git a/.github/workflows/sync-auto.yml b/.github/workflows/sync-auto.yml
index 4fb4ae737..b6e9d5729 100644
--- a/.github/workflows/sync-auto.yml
+++ b/.github/workflows/sync-auto.yml
@@ -45,6 +45,7 @@ jobs:
         uses: actions/checkout@v6
         with:
           fetch-depth: 0
+          ref: ${{ github.event.repository.default_branch }}
 
       - name: 检测默认分支
         run: |
@@ -114,6 +115,7 @@ jobs:
         uses: actions/checkout@v6
         with:
           fetch-depth: 0
+          ref: ${{ github.event.repository.default_branch }}
 
       - name: 检测默认分支
         run: |