some improvements

modules/git/ref.go

@@ -84,6 +84,19 @@ func RefNameFromCommit(shortName string) RefName {
 	return RefName(shortName)
 }
 
+func RefNameFromTypeAndShortName(tp RefType, shortName string) RefName {
+	switch tp {
+	case RefTypeBranch:
+		return RefNameFromBranch(shortName)
+	case RefTypeTag:
+		return RefNameFromTag(shortName)
+	case RefTypeCommit:
+		return RefNameFromCommit(shortName)
+	default:
+		return ""
+	}
+}
+
 func (ref RefName) String() string {
 	return string(ref)
 }