$ git clone -n https://src.fedoraproject.org/rpms/glmark2.git /var/lib/mock/f45-build-11180-428/root/chroot_tmpdir/scmroot/glmark2
Cloning into '/var/lib/mock/f45-build-11180-428/root/chroot_tmpdir/scmroot/glmark2'...
$ git fetch origin 6cef50d74bb031d97ff78ed907954d13e2ad3590:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/glmark2
 * [new ref]         6cef50d74bb031d97ff78ed907954d13e2ad3590 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6cef50d Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild