https://github.com/tillson/git-hound

https://github.com/mazen160/secrets-patterns-db

The largest open-source database for detecting secrets, API keys, passwords, tokens, and more. Use secrets-patterns-db to feed your secret scanning engine with regex patterns for identifying secrets.

https://github.com/trufflesecurity/trufflehog

https://github.com/metac0rtex/GitHarvester