I'm fully on-board with not using master-slave terminology. I work in the embedded space where those terms were and still are frequently used, and I support not using them any more. But I've been using git pretty much since it was released and I've never heard anyone refer to a "slave repo" or "slave branch". It's always been local repo, local branch, etc. I fully believe these sorts of digital hermeneutics (e.g. using a 26-year-old mailing list post to "prove" something, when actual usage is completely different) drive division and strife, all because some people want to use it to acquire status/prestige.