I seem to remember using a source code control system back in the early to mid 1990s called git. I used to work at IBM way back then. We didn't use it for a big project, but I do remember using it. Am I nuts? Wikipedia says Linus Torvalds wrote it in 2005. Was there any early version with the same name?
You are nuts, unfortunately. The thing that's now called GIT didn't exist at all until Linus invented it after experience with BitKeeper, and thinking about distributed version control. Linux didn't start using BitKeeper for the official mainline source tree until 2002, but some developers must have been using it before that. BitKeeper itself didn't exist until the late 90s (e.g. early-access beta in May 1999).
One of the major motivations for its creation was Bitkeeper's pricing change, making it inconvenient to developers to work on Linux if they didn't buy BitKeeper.
There was another project that used to be abbreviated as
git (e.g. in Debian package names), but the popularity of the GIT VCS led to the GNU Interactive Tools being renamed
gnuit. (And I only know that because I remember the Debian package-name conflict that led to GIT being pacakged as
git-vcs for a while.)