I've always thought, in a working environment, it would be best for everyone involved if designers got up to speed with git. I know git is hard, and I know designers are not necessarily command-line junkies.
Rather, my point is simply: it's worth it.
So for me, downloading a client that syncs, while useful, is not the _answer_.
The answer is for designers to embrace git and also for developers to make git easier to use. Whether that requires a better UI, better documentation, better tutorials, etc.
Git has the power to do all this and more, there just needs to be an intuitive wrapper for the workflow maybe?