Im not sure much is public info. I'm not there anymore but perhaps someone who is can.
Its called GitFarm and had a web UI where you could search with a few different operators, like exact word, path, file extension. They kinda half implemented searching by class name just for Java too. Another thing, you couldn't add a NOT, or exclude certain filepaths, which was annoying especially when ppl would accidentally commit node_modules. Overall, it wasn't too bad buy feels like it had kinda stagnated recently (KTLO).