fix: improve error message

cli/recipe/sync.go

@@ -118,6 +118,7 @@ likely to change.
 			if err := iter.ForEach(func(ref *plumbing.Reference) error {
 				obj, err := repo.TagObject(ref.Hash())
 				if err != nil {
+					logrus.Fatal("Tag at commit ", ref.Hash(), " is unannotated or otherwise broken. Please fix it.")
 					return err
 				}