FIXME: add a cache job

.gitea/workflows/gentoo-utils.yml

@@ -3,6 +3,21 @@ name: Gentoo Utils
 on: [push]
 
 jobs:
+  cache:
+    runs-on: ubuntu-latest
+    continue-on-error: true
+    steps:
+      - name: Restore git cache
+        uses: actions/cache@v4
+        with:
+          path: .git
+          key: gitea-repo-${{ gitea.repository }}-${{ gitea.ref }}
+    
+      - name: Checkout repo
+        uses: actions/checkout@v5
+        with:
+          fetch-depth: 0
+
   build-oci-image:
     runs-on: ubuntu-latest
     continue-on-error: true