diff --git a/.gitea/workflows/container-image.yml b/.gitea/workflows/container-image.yml
index 534509d..4a70f2b 100644
--- a/.gitea/workflows/container-image.yml
+++ b/.gitea/workflows/container-image.yml
@@ -20,7 +20,11 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out repository
-        uses: actions/checkout@v4
+        run: |
+          git init .
+          git remote add origin "https://gitea.mukan.0am.jp/${{ gitea.repository }}.git"
+          git fetch --depth=1 origin "${{ gitea.sha }}"
+          git checkout --detach FETCH_HEAD
 
       - name: Build test stage
         run: |