New comment by jason1987d on void-packages repository

https://github.com/void-linux/void-packages/pull/23695#issuecomment-662571517

Comment:
> @jason1987d you can run `git rebase -i HEAD~9` (where 9 is the number of commits you have here) and replace `pick` with `squash` for all of them. Then you just need to fix the final commit message and force push the branch here.

That did not work. 
fatal: invalid upstream 'HEAD-9'