$ git clone -n https://src.fedoraproject.org/rpms/opendnssec.git /var/lib/mock/f42-build-863102-171404/root/chroot_tmpdir/scmroot/opendnssec
Cloning into '/var/lib/mock/f42-build-863102-171404/root/chroot_tmpdir/scmroot/opendnssec'...
$ git fetch origin 566d4cae15c90b0073101ade210925d4226832a8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/opendnssec
 * [new ref]         566d4cae15c90b0073101ade210925d4226832a8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 566d4ca Rebuild for Jansson 2.14