$ git clone -n https://src.fedoraproject.org/rpms/sysbench.git /var/lib/mock/f38-build-side-42-init-devel-1006349-29377/root/chroot_tmpdir/scmroot/sysbench
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1006349-29377/root/chroot_tmpdir/scmroot/sysbench'...
$ git fetch origin ff6b7da45598e70f31727d8cb1b8115e85e4e6a2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/sysbench
 * [new ref]         ff6b7da45598e70f31727d8cb1b8115e85e4e6a2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ff6b7da Fix EL6 cond removal