$ git clone -n https://src.fedoraproject.org/rpms/ibus-m17n.git /var/lib/mock/f40-build-1737250-24672/root/chroot_tmpdir/scmroot/ibus-m17n
Cloning into '/var/lib/mock/f40-build-1737250-24672/root/chroot_tmpdir/scmroot/ibus-m17n'...
$ git fetch origin f737816ccf7f851a686d136a9796801862c8bb70:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ibus-m17n
 * [new ref]         f737816ccf7f851a686d136a9796801862c8bb70 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f737816 Update to 1.4.31