$ git clone -n https://src.fedoraproject.org/rpms/groonga-normalizer-mysql.git /var/lib/mock/f40-build-2246428-53814/root/chroot_tmpdir/scmroot/groonga-normalizer-mysql
Cloning into '/var/lib/mock/f40-build-2246428-53814/root/chroot_tmpdir/scmroot/groonga-normalizer-mysql'...
$ git fetch origin ff00d9583536154c668e39550e8286ab84cc9333:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/groonga-normalizer-mysql
 * [new ref]         ff00d9583536154c668e39550e8286ab84cc9333 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ff00d95 add msgpack-devel dependency