Auto Persist Model Changes to Folder (Git Repo)

At the moment the only way to persist to folder is to save to folder which sometimes dumps a load of stuff your not interested in. When I open a new branch in a git repo to do some work it would be nice for TE3 to write the changes directly to the folder automatically. That way only the stuff I'm adding or changing will show up as items to stage and commit. This could be enabled for both offline and connected models and would speed up the development process (GitHub Flow).