diff --git a/defaults/main.yaml b/defaults/main.yaml
index 8a760c8..012c0f1 100644
--- a/defaults/main.yaml
+++ b/defaults/main.yaml
@@ -19,7 +19,8 @@ diskimage_builder_task_manager:
 # tasks/config.yaml
 diskimage_builder_git_dest: /opt/ansible-role-diskimage-builder/git/openstack/diskimage-builder
 diskimage_builder_git_uri: https://git.openstack.org/openstack/diskimage-builder
-diskimage_builder_git_version: master
+# diskimage_builder_git_refspec:
+# diskimage_builder_git_version:
 
 diskimage_builder_install_method: git
 
diff --git a/tasks/install/git.yaml b/tasks/install/git.yaml
index 95d729f..3671796 100644
--- a/tasks/install/git.yaml
+++ b/tasks/install/git.yaml
@@ -16,8 +16,9 @@
   become: yes
   git:
     dest: "{{ diskimage_builder_git_dest }}"
+    refspec: "{{ diskimage_builder_git_refspec|default(omit) }}"
     repo: "{{ diskimage_builder_git_uri }}"
-    version: "{{ diskimage_builder_git_version }}"
+    version: "{{ diskimage_builder_git_version|default(omit) }}"
 
 - name: Pip install diskimage-builder from local git repo.
   become: yes