$ git clone -n https://src.fedoraproject.org/rpms/freight.git /var/lib/mock/f45-build-9269-400/root/chroot_tmpdir/scmroot/freight
Cloning into '/var/lib/mock/f45-build-9269-400/root/chroot_tmpdir/scmroot/freight'...
$ git fetch origin 6e4e156d7cc4b8d9b009369ffd81d0ce56badb21:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/freight
 * [new ref]         6e4e156d7cc4b8d9b009369ffd81d0ce56badb21 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6e4e156 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild