$ git clone -n https://src.fedoraproject.org/rpms/cups.git /var/lib/mock/f42-build-side-1-3537467-46559/root/chroot_tmpdir/scmroot/cups
Cloning into '/var/lib/mock/f42-build-side-1-3537467-46559/root/chroot_tmpdir/scmroot/cups'...
$ git fetch origin 467bb13659ca043c465fd1e2c8c113c0c5f68e46:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cups
 * [new ref]         467bb13659ca043c465fd1e2c8c113c0c5f68e46 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 467bb13 Make sure the /usr/sbin/lpc symlink is created on unmerged systems