$ git clone -n https://src.fedoraproject.org/rpms/rmtfs.git /var/lib/mock/f45-build-34564-688/root/chroot_tmpdir/scmroot/rmtfs
Cloning into '/var/lib/mock/f45-build-34564-688/root/chroot_tmpdir/scmroot/rmtfs'...
$ git fetch origin 5be553927e92f228afa3860bd89d987f8e46e1e4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rmtfs
 * [new ref]         5be553927e92f228afa3860bd89d987f8e46e1e4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5be5539 Update to 1.3