> In my language "master" translates to maestro, which predates US slavery and symbolizes something completely positive: a master of some - usually artistically relevant - craft with followers that branched from the original (like the master branch in git).

Exactly. Which is also (what at least I think) where "master copy", which has been claimed to be the origin of git's "master branch" comes from. Whether via the music industry's "master tape" as claimed elsewhere in this discussion, or more directly from the "master's manuscript" all the other monks duplicated in a mediaeval monastery's scriptorium, who knows... But zero to do with slavery, AFAICS.