Git is a distributed version control system used for tracking changes in source code during software development. Git allows a coding team to coordinate their work by allowing individuals to branch the source code and merge changes back in using commits. Code changes are documented and tracked which allows the users to colectively review the work of their team to ensure consistency, as well as the option to revert the code base back to a previous state if any issues arrise
As a A British Citizen, git means an unpleasant or contemptible person e.g. "He's a right git".