$ git clone -n https://src.fedoraproject.org/rpms/snappy.git /var/lib/mock/f41-build-side-1-2670029-28995/root/chroot_tmpdir/scmroot/snappy
Cloning into '/var/lib/mock/f41-build-side-1-2670029-28995/root/chroot_tmpdir/scmroot/snappy'...
$ git fetch origin eac8bab12db8984eedf57c6e46de93ebf1570c46:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/snappy
 * [new ref]         eac8bab12db8984eedf57c6e46de93ebf1570c46 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at eac8bab Disable google-benchmark on RHEL