$ git clone -n https://src.fedoraproject.org/rpms/boswars.git /var/lib/mock/f45-build-5042-337/root/chroot_tmpdir/scmroot/boswars
Cloning into '/var/lib/mock/f45-build-5042-337/root/chroot_tmpdir/scmroot/boswars'...
$ git fetch origin 281742f4a5061f6086bc43aab4c97bf17c68c090:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/boswars
 * [new ref]         281742f4a5061f6086bc43aab4c97bf17c68c090 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 281742f Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild