ci: added checkout step to workflow

.github/workflows/ci.yml

@@ -13,6 +13,22 @@ jobs:
         shell: sh
 
     steps:
+      - name: Checkout repository
+        env:
+          GITEA_TOKEN: ${{ secrets.GITEA_TOKEN }}
+        run: |
+          set -e
+          apk add --no-cache git
+
+          GIT_URL="https://${GITEA_TOKEN}@${GITHUB_SERVER_URL#https://}/${GITHUB_REPOSITORY}.git"
+          git clone --depth 1 --branch "$GITHUB_REF_NAME" "$GIT_URL" .
+
+          if [ "$(git rev-parse HEAD)" != "$GITHUB_SHA" ]; then
+            echo "Fetching exact commit $GITHUB_SHA..."
+            git fetch origin "$GITHUB_SHA" --depth 1
+            git checkout "$GITHUB_SHA"
+          fi
+
       - name: Install dependencies
         run: npm ci --prefer-offline