branch in git are not really heavyweight, look at for example at mercurial ones and why the pypy team prefer them [0] moreover I think this approach could be a

branch in git are not really heavyweight, look at for example at mercurial ones and why the pypy team prefer them [0] moreover I think this approach could be at least "scriptable", if not aliasable .. [0]: https://doc.pypy.org/en/latest/faq.html#why-doesn-t-pypy-use-git-and-move-to-github https://doc.pypy.org/en/latest/faq.html#why-doesn-t-pypy-use...