$ git clone -n https://src.fedoraproject.org/rpms/m17n-db.git /var/lib/mock/f40-build-2009851-45527/root/chroot_tmpdir/scmroot/m17n-db
Cloning into '/var/lib/mock/f40-build-2009851-45527/root/chroot_tmpdir/scmroot/m17n-db'...
$ git fetch origin 2d51366ad07d3a8887c0180525b5a3a768160fbd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/m17n-db
 * [new ref]         2d51366ad07d3a8887c0180525b5a3a768160fbd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2d51366 Update to 1.8.5