ref/refname: Add refname validation

1 files changed, 11 insertions, 0 deletions

diff --git a/ref/refname/pseudo.go b/ref/refname/pseudo.go
new file mode 100644
index 00000000..f0ad1ae8
--- /dev/null
+++ b/ref/refname/pseudo.go
@@ -0,0 +1,11 @@
+package refname
+
+// IsPseudo reports whether name is one Git pseudo-ref.
+func IsPseudo(name string) bool {
+	switch name {
+	case "FETCH_HEAD", "MERGE_HEAD":
+		return true
+	default:
+		return false
+	}
+}