$ git clone -n https://src.fedoraproject.org/rpms/sanlock.git /var/lib/mock/f42-build-867480-175511/root/chroot_tmpdir/scmroot/sanlock
Cloning into '/var/lib/mock/f42-build-867480-175511/root/chroot_tmpdir/scmroot/sanlock'...
$ git fetch origin d55f9ef4e05693526ed88861d817a1cdbc83bd3e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/sanlock
 * [new ref]         d55f9ef4e05693526ed88861d817a1cdbc83bd3e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d55f9ef Rebuilt for the bin-sbin merge (2nd attempt)