Update: I recently found this site called diawi.com which allows you to distribute the app similar to file-sharing sites, drag and drop ipa file and share the link to the testers.
Recommended Git workflow
I recently started using Git as my revision control tool. Impressed by the use of branching and merging, I create and merge a lot of branches. Our company use SVN and other peers were not aware/interested in Git. So I took the initiative to use svn-git. After months of progress I left with so many branches for features, svn, QA-release and quick-fix for released builds.