The named system for tracking every change to a body of work. It makes history a first-class thing rather than an afterthought.
British slang for a stupid or unpleasant person; Linus Torvalds named the tool for himself in 2005, joking that he named all his projects after himself.
Every change stays addressable instead of buried under whatever landed on top of it later, so a body of work becomes its own archive as it is made.