you can use the --in-reply-to to specify additional repo naddr pointers.

you can't currently override the ones it auto-selects. I considered saving a selected naddr to git config but its conceivable that for a large repo you might want to send different proposals to specific repositories (like to different working groups of a large repository).

I then thought it would be better to extract naddr's from remote urls once there is a git remote helper. If there were multiple nostr remotes, it could prompt the user to choose.