I wonder how it evolved into the modern British slang of “git”. To quote Wikipedia [0]
“modern British English slang, a git (/ɡɪt/) is a term of insult used to describe someone—usually a man—who is considered stupid, incompetent, annoying, unpleasant, or silly.“.
And
“ Git is a popular open-source software for version control created by Linus Torvalds. Torvalds jokingly named it "git" after the slang term, later defining it as "the stupid content tracker".”
“modern British English slang, a git (/ɡɪt/) is a term of insult used to describe someone—usually a man—who is considered stupid, incompetent, annoying, unpleasant, or silly.“.
And “ Git is a popular open-source software for version control created by Linus Torvalds. Torvalds jokingly named it "git" after the slang term, later defining it as "the stupid content tracker".”
[0] https://en.wikipedia.org/wiki/Git_(slang)