Hello, I am facing this an error : reference is not a tree while running git checkout $ZUUL_NEWREV which is a part of the gerrit.git-prep.sh file. The file can be located at the following link https://github.com/openstack-infra/project-config/blob/master/jenkins/scripts/gerrit-git-prep.sh git checkout $ZUUL_NEWREV ERROR: HEAD is now at 4570690 first_project_commit + git clean -x -f -d -q + echo master + grep -q '^refs/tags/' + '[' -z 5bc04e0127315bc0107cac27ce00424da965b685 ']' + git checkout 5bc04e0127315bc0107cac27ce00424da965b685 fatal: reference is not a tree: 5bc04e0127315bc0107cac27ce00424da965b685 Build step 'Execute shell' marked build as failure If somebody has any idea why i am facing this error. Please eloborate Best Regards, Fayyaz Ur Rehman, Corvit Technologies 14-D/1, Ghalib Road, Gulberg III, Lahore, Pakistan. UAN: +92-42-111-CORVIT Tel: +92-42-5717271-2(Ext: 129) Cell: +92-321-4184438 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.openstack.org/pipermail/openstack-infra/attachments/20150706/4389c377/attachment-0001.html>