https://github.com/src-d/gitcollector
borges collects and stores Git repositories.
I have always imagined that Paradise will be a kind of library.
Borges is a set of tools for collection and storage of Git repositories at large scale. It is a distributed system, similar to a search engine, that uses a custom repository storage file format and is optimized for saving storage space and keeping repositories up-to-date.
From here, you can directly go to getting started.
Also, is recommended to know borges key concepts.
GPLv3, see LICENSE