$ git clone -n https://src.fedoraproject.org/rpms/dnsdist.git /var/lib/mock/f40-build-780387-130939/root/chroot_tmpdir/scmroot/dnsdist
Cloning into '/var/lib/mock/f40-build-780387-130939/root/chroot_tmpdir/scmroot/dnsdist'...
$ git fetch origin 20a9bdfed13557221e7b0245a171471065a6de60:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/dnsdist
 * [new ref]         20a9bdfed13557221e7b0245a171471065a6de60 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 20a9bdf Update to latest upstream