$ git clone -n https://src.fedoraproject.org/rpms/kclock.git /var/lib/mock/f42-bootstrap-3533750-46421/root/chroot_tmpdir/scmroot/kclock
Cloning into '/var/lib/mock/f42-bootstrap-3533750-46421/root/chroot_tmpdir/scmroot/kclock'...
$ git fetch origin 1a91fb373e50c7efbeece0fa9a7919c63dea2bbb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kclock
 * [new ref]         1a91fb373e50c7efbeece0fa9a7919c63dea2bbb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1a91fb3 Merge branch 'rawhide' into f42