$ git clone -n https://src.fedoraproject.org/rpms/m17n-lib.git /var/lib/mock/f40-build-739848-109314/root/chroot_tmpdir/scmroot/m17n-lib
Cloning into '/var/lib/mock/f40-build-739848-109314/root/chroot_tmpdir/scmroot/m17n-lib'...
$ git fetch origin 432d9711e8c7eaab98268ffed0b5d02b8611ed6c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/m17n-lib
 * [new ref]         432d9711e8c7eaab98268ffed0b5d02b8611ed6c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 432d971 Update to 1.8.4