Ask HN: Is there a service that allows hosting iOS/Android builds per “branch”

I've asked this question on stackexchange but it never got much attention: http://apple.stackexchange.com/questions/276552/is-there-a-service-that-allows-distributing-ios-builds-per-git-branches

What I'm looking for is a service that hosts iOS/Android builds per git branch. The goal is that our CI would build on each commit and push a new build to that service so that early testers can juggle between branches and test on real devices.

All the "beta" services I could find (like TestFlight or HockeyApp) only allow either one active build, or one active build per version. It doesn't help much because typically those branches are not part of a release yet.

Thanks!