add checkout-ref paramter

.github/actions/build-and-push-dotnet/action.yaml

@@ -12,6 +12,10 @@ inputs:
     description: Override image tag (defaults to standard tags)
     required: false
     default: ""
+  checkout_ref:
+    description: Git ref to checkout before build (e.g. refs/tags/v1.2.3)
+    required: false
+    default: ""
   dockerfile:
     description: Path to Dockerfile
     required: false
@@ -42,6 +46,7 @@ runs:
       with:
         fetch-depth: 0
         fetch-tags: true
+        ref: ${{ inputs.checkout_ref != '' && inputs.checkout_ref || '' }}
 
     - name: Set up Docker Buildx
       uses: docker/setup-buildx-action@v3

.github/actions/build-and-push/action.yaml

@@ -12,6 +12,10 @@ inputs:
     description: Override image tag (defaults to standard tags)
     required: false
     default: ""
+  checkout_ref:
+    description: Git ref to checkout before build (e.g. refs/tags/v1.2.3)
+    required: false
+    default: ""
   dockerfile:
     description: Path to Dockerfile
     required: false
@@ -38,6 +42,7 @@ runs:
       with:
         fetch-depth: 0
         fetch-tags: true
+        ref: ${{ inputs.checkout_ref != '' && inputs.checkout_ref || '' }}
 
     - name: Set up Docker Buildx
       uses: docker/setup-buildx-action@v3