$ git clone -n https://src.fedoraproject.org/rpms/bind9-next.git /var/lib/mock/f41-build-1468881-23743/root/chroot_tmpdir/scmroot/bind9-next
Cloning into '/var/lib/mock/f41-build-1468881-23743/root/chroot_tmpdir/scmroot/bind9-next'...
$ git fetch origin d2b77fd8973913af7484ef169182e0d82411b2f7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/bind9-next
 * [new ref]         d2b77fd8973913af7484ef169182e0d82411b2f7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d2b77fd Make documentation links relative