Re: Old git
Nope, I believe "git" ever had a positive meaning. If you can by our friends at Oxford
* https://www.lexico.com/definition/git
"informal British: An unpleasant or contemptible person."
This highlights the more general issue of regional and international differences. There is not single universal standard "English". Many/some of the replacement phrases/words have often different or sometimes even negative or offensive meaning outside "American". Yes, many are quite universal,