For magit users, there's https://github.com/magit/forge https://github.com/magit/forge - ultimately the store of record is still centralized as it's GitHub/GitL

For magit users, there's https://github.com/magit/forge https://github.com/magit/forge - ultimately the store of record is still centralized as it's GitHub/GitLab/etc., but it does integrate a local copy of it nicely with your other git operations.