$ git clone -n https://src.fedoraproject.org/rpms/luckybackup.git /var/lib/mock/f45-build-17724-503/root/chroot_tmpdir/scmroot/luckybackup
Cloning into '/var/lib/mock/f45-build-17724-503/root/chroot_tmpdir/scmroot/luckybackup'...
$ git fetch origin 7d82281b10e92d924f25e24c43bd8759e1bbd470:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/luckybackup
 * [new ref]         7d82281b10e92d924f25e24c43bd8759e1bbd470 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7d82281 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild