Some time ago I had to migrate issues from a Github project to another. In this particular case, I moved Plone CMS developer documentation issues from under my personal Github account to under the Plone’s collective community team project.
Github currently does not offer native support to move issues or issue trackers between projects. This is little strange, because I think it’s quite common use case that a personal project gets promoted under a team umbrella, the primary Github project gets changed and you want to move issues too.
Luckily, Github API provides some support for such manipulation. I found an old Python script gh-issue-importer.py by Max Korenkov for this very purpose. I refined the script to get it to a semi-working state to get my one off batch job done. Now, out of blue, Antoine Durieux apparently polished the script to make sure moving comments work.
So, meet gh-issue-importer.py, a crude hacked together piece of Python script shuffling your issues around. It also imports milestones and labels of Github project. The script uses raw urllib and Github v3 API for the heavy lifting.
If you know anything better for the task please let me know (in comments).