In the manual, GIT is "the stupid content tracker". The abbreviation of "the stupid content tracker" is not GIT. I doubt about what the abbreviation of GIT.
According to the initial commit to the git tree:
"git" can mean anything, depending on your mood.
- random three-letter combination that is pronounceable, and not actually used by any common UNIX command. The fact that it is a mispronounciation of "get" may or may not be relevant.
- stupid. contemptible and despicable. simple. Take your pick from the dictionary of slang.
- "global information tracker": you're in a good mood, and it actually works for you. Angels sing, and a light suddenly fills the room.
- "goddamn idiotic truckload of sh*t": when it breaks