コミットのメアドなどを晒したくなかった次第

https://github.com/settings/emails

Keep my email addresses private

We’ll remove your public profile email and use 11024212+yuukanehiro@users.noreply.github.com when performing web-based Git operations (e.g. edits and merges) and sending email on your behalf. If you want command line Git operations to use your private email you must set your email in Git.

Previously authored commits associated with a public email will remain public.

ここに合った。

% git config --global user.email 11024212+yuukanehiro@users.noreply.github.com