zsh-users/zsh-completions — pull request #152 by xuhdev (2013-06-01 08:20:36+00:00)
Title: Add zsh-completions.plugin.zsh file for easy installation with oh-my-zsh

Clone zsh-completions to ~/.oh-my-zsh/custom/plugins, and add

plugins+=zsh-completions

should be able to activate this as an oh-my-zsh plugin.