Rakefile: upgrade: do not fetch all remotes.
Rakefile: upgrade: do not fetch all remotes.

We're only merging FETCH_HEAD after fetching the submodules' url.

blueyed/dotfiles,scorpiovn/dotfiles,scorpiovn/dotfiles,blueyed/dotfiles,scorpiovn/dotfiles,blueyed/dotfiles,blueyed/dotfiles,scorpiovn/dotfiles,blueyed/dotfiles,scorpiovn/dotfiles