$ git clone -n https://src.fedoraproject.org/rpms/fabtests.git /var/lib/mock/f40-build-2686965-68078/root/chroot_tmpdir/scmroot/fabtests
Cloning into '/var/lib/mock/f40-build-2686965-68078/root/chroot_tmpdir/scmroot/fabtests'...
$ git fetch origin 0e573fdbe8a659de1095a024d8799f9a5de48999:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fabtests
 * [new ref]         0e573fdbe8a659de1095a024d8799f9a5de48999 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0e573fd Properly check valgrind arches