$ git clone -n https://src.fedoraproject.org/rpms/fcitx5-m17n.git /var/lib/mock/f40-build-1996148-43982/root/chroot_tmpdir/scmroot/fcitx5-m17n
Cloning into '/var/lib/mock/f40-build-1996148-43982/root/chroot_tmpdir/scmroot/fcitx5-m17n'...
$ git fetch origin d64e7e455d6205aec10eca9eb26827ec1985f9c7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fcitx5-m17n
 * [new ref]         d64e7e455d6205aec10eca9eb26827ec1985f9c7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d64e7e4 update to upstream release 5.1.0