fix: use struct data for HEAD retrieval

See ce7dda1eae

pkg/recipe/git.go

@@ -228,7 +228,7 @@ func (r Recipe) EnsureUpToDate() error {
 func (r Recipe) ChaosVersion() (string, error) {
 	var version string
 
-	head, err := gitPkg.GetRecipeHead(r.Name)
+	head, err := r.Head()
 	if err != nil {
 		return version, err
 	}
@@ -379,3 +379,18 @@ func (r Recipe) GetRecipeVersions() (RecipeVersions, error) {
 
 	return versions, nil
 }
+
+// Head retrieves latest HEAD metadata.
+func (r Recipe) Head() (*plumbing.Reference, error) {
+	repo, err := git.PlainOpen(r.Dir)
+	if err != nil {
+		return nil, err
+	}
+
+	head, err := repo.Head()
+	if err != nil {
+		return nil, err
+	}
+
+	return head, nil
+}