$ git clone -n https://src.fedoraproject.org/rpms/golang-vitess.git /var/lib/mock/f40-build-2581044-62386/root/chroot_tmpdir/scmroot/golang-vitess
Cloning into '/var/lib/mock/f40-build-2581044-62386/root/chroot_tmpdir/scmroot/golang-vitess'...
$ git fetch origin e3a286ea08b58215e0d20e03e8d1f6db993b66c0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-vitess
 * [new ref]         e3a286ea08b58215e0d20e03e8d1f6db993b66c0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e3a286e Retired: Long term failure to build