I find it maddening that git hasn't added a standard mechanism for metadata.
Commit comments are metadata. Tags are metadata. Why isn't there a general-purpose metadata plumbing so we can attach issues, merge and commit discussions, and wikis, in a portable way?
No, being able to export from one centralized repository and import into another isn't good enough.
The Pagure git forge keeps all project metadata (issues, PRs, etc.) on git, so you have it all if your Pagure instance ever goes down & can easily move it to another instance:
*Just found the answer: https://developer.github.com/v3/issues/