Nat Friedmanさんのツイート: "? We've just shipped the ability to transfer an issue from one repo to another. This is one of the most-requested GitHub features. Feels good!… https://t.co/DPlCWvJwlv"
https://twitter.com/natfriedman/status/1057678371256119297
issue を別 repo に移す機能が beta で来たっぽい