git plugin: make gclean safer, introduce gpristine
git plugin: make gclean safer, introduce gpristine

nunogt/oh-my-zsh,tekniklr/oh-my-zsh,FrankSansC/oh-my-zsh,FrankSansC/oh-my-zsh,nunogt/oh-my-zsh,lightmanhk/oh-my-zsh,lightmanhk/oh-my-zsh,lightmanhk/oh-my-zsh,tekniklr/oh-my-zsh,FrankSansC/oh-my-zsh,FrankSansC/oh-my-zsh,lightmanhk/oh-my-zsh