for me
bash -c "$(curl -H 'Cache-Control: no-cache' -fsSL http://bit.ly/dippindotfiles)"
for you
export DOTFILES_GH_USER=<username>
export DOTFILES_GH_BRANCH=master
bash -c "$(curl -fsSL https://raw.githubusercontent.com/$DOTFILES_GH_USER/dippin-dotfiles/$DOTFILES_GH_BRANCH/bootstrap.sh)"