You can potentially use CopyBara https://github.com/google/copybara https://github.com/google/copybara We go much further than CopyBara by syncing CI / CD pipe

You can potentially use CopyBara https://github.com/google/copybara https://github.com/google/copybara We go much further than CopyBara by syncing CI / CD pipelines, syncing review comments and so on. We are considering launching GitSlice as product on its own. If you are interested, email me and I can keep you updated when its ready to test (hamza [at] gitstart [dot] com)