Treat incomplete remote tag observations as uncertain

internal/git/tag.go

@@ -124,7 +124,7 @@ func (endpoint Endpoint) QueryTag(ctx context.Context, repositoryDir, tag string
 			remoteTag = mergeRef(remoteTag, object, true)
 		}
 	}
-	return remoteTag, nil
+	return finalizeRef(remoteTag), nil
 }
 
 // PushTag publishes only the captured tag object to its exact tag ref.