$ git clone -n https://src.fedoraproject.org/rpms/ibus-m17n.git /var/lib/mock/f39-build-1962766-43271/root/chroot_tmpdir/scmroot/ibus-m17n
Cloning into '/var/lib/mock/f39-build-1962766-43271/root/chroot_tmpdir/scmroot/ibus-m17n'...
$ git fetch origin 462baac3cf8bbd0159b608bf87637ab177272f58:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ibus-m17n
 * [new ref]         462baac3cf8bbd0159b608bf87637ab177272f58 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 462baac Update to 1.4.27