$ git clone -n https://src.fedoraproject.org/rpms/python-jenkins.git /var/lib/mock/f40-build-2127956-50785/root/chroot_tmpdir/scmroot/python-jenkins
Cloning into '/var/lib/mock/f40-build-2127956-50785/root/chroot_tmpdir/scmroot/python-jenkins'...
$ git fetch origin 7b6d81b734d8148da6afb33a7f3ee3b3e4ae17de:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-jenkins
 * [new ref]         7b6d81b734d8148da6afb33a7f3ee3b3e4ae17de -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7b6d81b Update to 1.8.0