Bower install using only https?

You can make git replace the protocol for you. Just run:

git config --global url."https://".insteadOf git://

to use HTTPS protocol instead of Git.

Building on the answer from @Sindre, I wrote a little helper function in BASH which lives in my ~/.bashrc file. Call it just as you would grunt, except now it's called nngrunt. Enjoy!

function nngrunt
{
    # Add a section to the global gitconfig file ~/.gitconfig that tells git to
    # go over http instead of the git protocol, otherwise bower has fits...
    # See http://stackoverflow.com/questions/15669091/bower-install-using-only-https
    git config --global url."https://".insteadOf git://

    # Run grunt w/ any supplied args
    grunt "$@"

    # Now cleanup the section we added to the git config file
    # Of course we have our own extra cleanup to do via sed since the unset command
    # leaves the section around
    # See http://git.661346.n2.nabble.com/git-config-unset-does-not-remove-section-td7569639.html
    git config --global --unset url."https://".insteadOf
    sed -i 's/\[url "https:\/\/"\]//' ~/.gitconfig
    sed -i '/^$/d' ~/.gitconfig
}