I've heard good things from our customers about spr for GitHub (https://github.com/ejoffe/spr https://github.com/ejoffe/spr). It extends git with useful comman

I've heard good things from our customers about spr for GitHub (https://github.com/ejoffe/spr https://github.com/ejoffe/spr). It extends git with useful commands and hooks directly into GitHub PRs. We'll be adding some direct support for the tool in Reviewable shortly.