diff --git a/gitTag.common.go b/gitTag.common.go
new file mode 100644
index 0000000..64cef8f
--- /dev/null
+++ b/gitTag.common.go
@@ -0,0 +1,15 @@
+package gitpb
+
+func (repo *Repo) DevelHash() string {
+	brname := repo.GetDevelBranchName()
+	refname := "refs/heads/" + brname
+	all := repo.Tags.All()
+	for all.Scan() {
+		tag := all.Next()
+		// log.Info("repo tag", tag.GetHash(), tag.GetRefname())
+		if tag.GetRefname() == refname {
+			return tag.GetHash()
+		}
+	}
+	return ""
+}