$ git clone -n https://src.fedoraproject.org/rpms/flmsg.git /var/lib/mock/f45-build-9075-398/root/chroot_tmpdir/scmroot/flmsg
Cloning into '/var/lib/mock/f45-build-9075-398/root/chroot_tmpdir/scmroot/flmsg'...
$ git fetch origin 2d71538e8f378e04d587e62dced94278088ce306:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/flmsg
 * [new ref]         2d71538e8f378e04d587e62dced94278088ce306 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2d71538 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild