Is there a system which allows fast API access to the complete version history and any version of any file in any out of several hundred git repos. The git CLI is way too slow. Gerrit is even slower.
I am basically looking for something which can automatically mirror a large number of git repos, but store the data in a more efficient way so that it can be quickly accessed via some API. Read a bit about OpenGrok, but its API does not seem to make detailed version history available. It is more focused on searching.