$ git clone -n https://github.com/xcp-ng-rpms/createrepo_c.git /var/lib/mock/v8.3-u-pcoval2-10142-28743/root/chroot_tmpdir/scmroot/createrepo_c
Cloning into '/var/lib/mock/v8.3-u-pcoval2-10142-28743/root/chroot_tmpdir/scmroot/createrepo_c'...
$ git fetch origin 53270ba9b93cfa25a3996f23f87898ce9de2b77d:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/createrepo_c
 * [new ref]         53270ba9b93cfa25a3996f23f87898ce9de2b77d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 53270ba bump release for test build