$ git clone -n https://src.fedoraproject.org/rpms/oniguruma.git /var/lib/mock/f40-build-2013755-45919/root/chroot_tmpdir/scmroot/oniguruma
Cloning into '/var/lib/mock/f40-build-2013755-45919/root/chroot_tmpdir/scmroot/oniguruma'...
$ git fetch origin 001e04fef4d168e35e23bf3eded3afbc8c513d12:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/oniguruma
 * [new ref]         001e04fef4d168e35e23bf3eded3afbc8c513d12 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 001e04f 6.9.9