Checkout repository

Podman doesn't support the branch option so we need to checkout ourself
to make sure the right ref is checked out.

.forgejo/workflows/build.yaml

@@ -34,11 +34,17 @@ jobs:
           DEPLOY_IMAGE=${{ env.REGISTRY_IMAGE }}:${{ github.ref_name }}
           DEPLOY_BRANCH=${{ github.ref_name }}
           EOF
+      -
+        name: Checkout repository
+        run: |
+          git config --global credential.helper store
+          echo "https://runner:${{ secrets.GITHUB_TOKEN }}@$(echo "${{ github.server_url }}" | cut -b 9-)" > ~/.git-credentials
+          git clone --branch ${{ github.ref_name }} ${{ github.server_url }}/${{ github.repository }} ${{ github.workspace }}
       -
         name: Build and push
         shell: bash
         run: |
-          podman build --tag ${{ env.REGISTRY_IMAGE}}:latest ${{ github.server_url }}/${{ github.repository }}.git
+          podman build --tag ${{ env.REGISTRY_IMAGE }}:latest ${{ github.workspace }}
           podman push ${{ env.REGISTRY_IMAGE }}:latest
     outputs:
       DEPLOY_IMAGE: ${{ steps.info.outputs.DEPLOY_IMAGE }}