Step one:
cat <<EOF >>~/.gitconfig [alias] review = !sh \`git rev-parse --show-toplevel\`/tools/rfc.sh EOF
Step two (with your Launchpad username):
git remote add gerrit ssh://[email protected]:29418/openstack/horizon
If it worked, you can now run:
git review
That should give you a success message on a clean (unchanged branch), or submit changes for review if your branch is ahead of master.