tried to get a git ref log but failed

main.go

@@ -21,9 +21,37 @@ func main() {
 	if repo == nil {
 		os.Exit(-1)
 	}
-	walkBranches(repo)
+	b := walkBranches(repo)
+
+	// o, err := b.Reference.Peel(b.Reference.Type())
+	o, err := b.Reference.Peel(git.ObjectTree)
+	if err != nil {
+		log.Info("ref peel() failed", err)
+		return
+	}
+	t, errt := o.AsTree()
+	if errt != nil {
+		log.Info("object AsTree() failed", errt)
+		return
+	}
+	walkTree(t)
 }
 
+// lists the files in the git repo
+// Makefile, .gitignore, README.md, etc
+func walkTree(tree *git.Tree) {
+	var callCount int
+	err := tree.Walk(func(name string, entry *git.TreeEntry) error {
+		callCount++
+		log.Info("walkTree()", callCount, entry.Name, entry.Id, entry.Type)
+
+		return nil
+	})
+	log.Info("walkTree() count", callCount, err)
+}
+
+// lists the branches
+// "master", "devel", "jcarr"
 func walkBranches(repo *git.Repository) *git.Branch {
 	i, err := repo.NewBranchIterator(git.BranchLocal)
 	if err != nil {