refactor: checkout no longer depends on node actions

.gitea/workflows/package.yml

@@ -16,9 +16,29 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        env:
-        with:
+          SERVER_URL: ${{ github.server_url }}
-          github-server-url: ${{ github.server_url }}
+          REPOSITORY: ${{ github.repository }}
+          COMMIT_SHA: ${{ github.sha }}
+          GIT_USERNAME: ${{ github.actor }}
+          GIT_TOKEN: ${{ github.token }}
+        run: |
+          case "$SERVER_URL" in
+            http://*)
+              AUTH_SERVER_URL="http://${GIT_USERNAME}:${GIT_TOKEN}@${SERVER_URL#http://}"
+              ;;
+            https://*)
+              AUTH_SERVER_URL="https://${GIT_USERNAME}:${GIT_TOKEN}@${SERVER_URL#https://}"
+              ;;
+            *)
+              AUTH_SERVER_URL="$SERVER_URL"
+              ;;
+          esac
+
+          git init .
+          git remote add origin "${AUTH_SERVER_URL}/${REPOSITORY}.git"
+          git fetch --depth=1 origin "$COMMIT_SHA"
+          git checkout --detach FETCH_HEAD
 
       - name: Normalize image metadata
         env: