@Brett_E_Carlock I think the only way to do this is with a script which accesses the API reads out the issues content and writes them to another repo. But this will only work with issues not with PRs. Is moving/renaming a repo not an option?
The only other thing is to ask an admin if they could do some SQL magic in the DB.

Stupid idea after some thinking: move the repo where you want it to be, then fork it and modify the content of the moved repo to your liking. Then kill the link of the fork.