diff --git a/.forgejo/workflows/example.yaml b/.forgejo/workflows/example.yaml
index 6eae187..5be6ca5 100644
--- a/.forgejo/workflows/example.yaml
+++ b/.forgejo/workflows/example.yaml
@@ -8,4 +8,10 @@ jobs:
     container:
       image: git.hswro.org/fleg/actions-experiments:latest
     steps:
+      - run: git version
+      - run: git init
+      - run: git remote add origin "${GITHUB_SERVER_URL}/${GITHUB_REPOSITORY}"
+      - run: git fetch --no-tags --prune --no-recurse-submodules --depth=1 origin "+${GITHUB_SHA}:${GITHUB_REF}"
+      - run: git checkout --force "${GITHUB_REF}"
+      - run: cat README.md
       - run: cat /etc/os-release
diff --git a/Dockerfile b/Dockerfile
index 4a74ebf..874b2d6 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,3 +1,3 @@
-FROM alpine:3.20
+FROM alpine:3.21
 
-RUN apk add --update gcc g++ make openssl-dev libc-dev ruby ruby-dev ruby-bundler ruby-json
+RUN apk add --update git