Git listing non-existent remotes

Question

I recently made some changes to my remote repos in my Git repo config file. I renamed the remote names, changing my origin to another remote repo and renaming my old origin

Answer 1

You used to have a remote named future, and you don't now.

Hence, git remote whatever future can't help, because there is no remote named future. (Normally git remote update -p or git remote prune, as in the comments above, would let you get rid of these.)

The simplest option would seem to be to delete them manually:

git update-ref -d refs/remotes/future/branch1
git update-ref -d refs/remotes/future/branch2

(or rm -r .git/refs/remotes/future and/or edit .git/packed-refs, depending on whether these refs have gotten packed).

[Incidentally, I'd also run git config -e (or vi .git/config which is what I usually really do :-) ) and make sure there are no other left-over references to the future remote.]