$ git clone -n https://src.fedoraproject.org/rpms/dnsx.git /var/lib/mock/f40-build-2164753-50972/root/chroot_tmpdir/scmroot/dnsx
Cloning into '/var/lib/mock/f40-build-2164753-50972/root/chroot_tmpdir/scmroot/dnsx'...
$ git fetch origin d101f1a1796563e30f7882e34972b8628a704aff:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/dnsx
 * [new ref]         d101f1a1796563e30f7882e34972b8628a704aff -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d101f1a Update to 1.1.6 - Closes rhbz#2249448 rhbz#2248264