Add missing `command` wrapper for git

Signed-off-by: Mikhail S. Pobolovets <styx.mp@gmail.com>

lib/git.zsh

 # get the name of the branch we are on
 function git_prompt_info() {
-  if [[ "$(git config --get oh-my-zsh.hide-status)" != "1" ]]; then
+  if [[ "$(command git config --get oh-my-zsh.hide-status)" != "1" ]]; then
     ref=$(command git symbolic-ref HEAD 2> /dev/null) || \
     ref=$(command git rev-parse --short HEAD 2> /dev/null) || return 0
     echo "$ZSH_THEME_GIT_PROMPT_PREFIX${ref#refs/heads/}$(parse_git_dirty)$ZSH_THEME_GIT_PROMPT_SUFFIX"