We're looking at the next couple of weeks for a beta, all going well. the support we're adding allows command lines to be specified for each of the source control actions, which means that *any* source control system will be configurable, in theory.
We haven't prioritized this on our backlog just yet. Although GIT is increasing in popularity, it has quite a small share of the market. Once adoption has increased, and we see more demand, we'll add the feature.