$ git clone -n https://src.fedoraproject.org/rpms/xiphos.git /var/lib/mock/f42-build-879037-181609/root/chroot_tmpdir/scmroot/xiphos
Cloning into '/var/lib/mock/f42-build-879037-181609/root/chroot_tmpdir/scmroot/xiphos'...
$ git fetch origin fd1f65c24b0ed5f84970b4b97c2fb46cc6cd1627:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xiphos
 * [new ref]         fd1f65c24b0ed5f84970b4b97c2fb46cc6cd1627 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fd1f65c Strip out editor component to resolve FTBFS