$ git clone -n https://src.fedoraproject.org/rpms/glmark2.git /var/lib/mock/f40-build-2196804-51605/root/chroot_tmpdir/scmroot/glmark2
Cloning into '/var/lib/mock/f40-build-2196804-51605/root/chroot_tmpdir/scmroot/glmark2'...
$ git fetch origin 68337d127b135ce849e559f649b959715f9b5036:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/glmark2
 * [new ref]         68337d127b135ce849e559f649b959715f9b5036 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 68337d1 Enable gbm offscreen backend