There are still lots of questions on properly using git for doing development work with GNU Radio. Jason Abele from Ettus Research sent me this link, which is a good, general guide to using Git with gEDA. gEDA is also an open source project, so some of the lessons they teach here are relevant to our community, too. I've added a link to this on our GNU Radio project site's page on using Git (http://gnuradio.org/redmine/projects/gnuradio/wiki/DevelopingWithGit).