$ git clone -n https://src.fedoraproject.org/rpms/four-in-a-row.git /var/lib/mock/f45-build-9186-399/root/chroot_tmpdir/scmroot/four-in-a-row
Cloning into '/var/lib/mock/f45-build-9186-399/root/chroot_tmpdir/scmroot/four-in-a-row'...
$ git fetch origin 8f84662b6cdf021fc90dcff41e98d603d38e5893:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/four-in-a-row
 * [new ref]         8f84662b6cdf021fc90dcff41e98d603d38e5893 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8f84662 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild