$ git clone -n https://src.fedoraproject.org/rpms/fcitx5-m17n.git /var/lib/mock/f45-build-8818-396/root/chroot_tmpdir/scmroot/fcitx5-m17n
Cloning into '/var/lib/mock/f45-build-8818-396/root/chroot_tmpdir/scmroot/fcitx5-m17n'...
$ git fetch origin 18fb96d433fd79115fb5f478fe586c85be4e1c54:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fcitx5-m17n
 * [new ref]         18fb96d433fd79115fb5f478fe586c85be4e1c54 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 18fb96d Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild