That's a huge amount of trust you've placed in bit.ly, and in insecure http. You might at least consider typing out https://bit.ly/newbox so that you only have to trust bit.ly. Better yet, memorize the URL that bit.ly links to.
Also, why do you symlink your dotfiles into your cloned git repo, rather than just checking out the git repo as ~? Personally, I just move the .git directory from the clone to ~, and then "git checkout -f".