Fixed slow behavior when using GitHub wrappers

lib/git.zsh

 # get the name of the branch we are on
 function git_prompt_info() {
-  ref=$(git symbolic-ref HEAD 2> /dev/null) || \
-  ref=$(git rev-parse --short HEAD 2> /dev/null) || return
+  ref=$(command git symbolic-ref HEAD 2> /dev/null) || \
+  ref=$(command git rev-parse --short HEAD 2> /dev/null) || return
   echo "$ZSH_THEME_GIT_PROMPT_PREFIX${ref#refs/heads/}$(parse_git_dirty)$ZSH_THEME_GIT_PROMPT_SUFFIX"
 }
 
@@ -11,14 +11,14 @@ parse_git_dirty() {
   local SUBMODULE_SYNTAX=''
   local GIT_STATUS=''
   local CLEAN_MESSAGE='nothing to commit (working directory clean)'
-  if [[ "$(git config --get oh-my-zsh.hide-status)" != "1" ]]; then
+  if [[ "$(command git config --get oh-my-zsh.hide-status)" != "1" ]]; then
     if [[ $POST_1_7_2_GIT -gt 0 ]]; then
           SUBMODULE_SYNTAX="--ignore-submodules=dirty"
     fi
     if [[ "$DISABLE_UNTRACKED_FILES_DIRTY" == "true" ]]; then
-        GIT_STATUS=$(git status -s ${SUBMODULE_SYNTAX} -uno 2> /dev/null | tail -n1)
+        GIT_STATUS=$(command git status -s ${SUBMODULE_SYNTAX} -uno 2> /dev/null | tail -n1)
     else
-        GIT_STATUS=$(git status -s ${SUBMODULE_SYNTAX} 2> /dev/null | tail -n1)
+        GIT_STATUS=$(command git status -s ${SUBMODULE_SYNTAX} 2> /dev/null | tail -n1)
     fi
     if [[ -n $GIT_STATUS ]]; then
       echo "$ZSH_THEME_GIT_PROMPT_DIRTY"
@@ -32,10 +32,10 @@ parse_git_dirty() {
 
 # get the difference between the local and remote branches
 git_remote_status() {
-    remote=${$(git rev-parse --verify ${hook_com[branch]}@{upstream} --symbolic-full-name 2>/dev/null)/refs\/remotes\/}
+    remote=${$(command git rev-parse --verify ${hook_com[branch]}@{upstream} --symbolic-full-name 2>/dev/null)/refs\/remotes\/}
     if [[ -n ${remote} ]] ; then
-        ahead=$(git rev-list ${hook_com[branch]}@{upstream}..HEAD 2>/dev/null | wc -l)
-        behind=$(git rev-list HEAD..${hook_com[branch]}@{upstream} 2>/dev/null | wc -l)
+        ahead=$(command git rev-list ${hook_com[branch]}@{upstream}..HEAD 2>/dev/null | wc -l)
+        behind=$(command git rev-list HEAD..${hook_com[branch]}@{upstream} 2>/dev/null | wc -l)
 
         if [ $ahead -eq 0 ] && [ $behind -gt 0 ]
         then
@@ -52,24 +52,24 @@ git_remote_status() {
 
 # Checks if there are commits ahead from remote
 function git_prompt_ahead() {
-  if $(echo "$(git log origin/$(current_branch)..HEAD 2> /dev/null)" | grep '^commit' &> /dev/null); then
+  if $(echo "$(command git log origin/$(current_branch)..HEAD 2> /dev/null)" | grep '^commit' &> /dev/null); then
     echo "$ZSH_THEME_GIT_PROMPT_AHEAD"
   fi
 }
 
 # Formats prompt string for current git commit short SHA
 function git_prompt_short_sha() {
-  SHA=$(git rev-parse --short HEAD 2> /dev/null) && echo "$ZSH_THEME_GIT_PROMPT_SHA_BEFORE$SHA$ZSH_THEME_GIT_PROMPT_SHA_AFTER"
+  SHA=$(command git rev-parse --short HEAD 2> /dev/null) && echo "$ZSH_THEME_GIT_PROMPT_SHA_BEFORE$SHA$ZSH_THEME_GIT_PROMPT_SHA_AFTER"
 }
 
 # Formats prompt string for current git commit long SHA
 function git_prompt_long_sha() {
-  SHA=$(git rev-parse HEAD 2> /dev/null) && echo "$ZSH_THEME_GIT_PROMPT_SHA_BEFORE$SHA$ZSH_THEME_GIT_PROMPT_SHA_AFTER"
+  SHA=$(command git rev-parse HEAD 2> /dev/null) && echo "$ZSH_THEME_GIT_PROMPT_SHA_BEFORE$SHA$ZSH_THEME_GIT_PROMPT_SHA_AFTER"
 }
 
 # Get the status of the working tree
 git_prompt_status() {
-  INDEX=$(git status --porcelain -b 2> /dev/null)
+  INDEX=$(command git status --porcelain -b 2> /dev/null)
   STATUS=""
   if $(echo "$INDEX" | grep -E '^\?\? ' &> /dev/null); then
     STATUS="$ZSH_THEME_GIT_PROMPT_UNTRACKED$STATUS"
@@ -96,7 +96,7 @@ git_prompt_status() {
   elif $(echo "$INDEX" | grep '^AD ' &> /dev/null); then
     STATUS="$ZSH_THEME_GIT_PROMPT_DELETED$STATUS"
   fi
-  if $(git rev-parse --verify refs/stash >/dev/null 2>&1); then
+  if $(command git rev-parse --verify refs/stash >/dev/null 2>&1); then
     STATUS="$ZSH_THEME_GIT_PROMPT_STASHED$STATUS"
   fi
   if $(echo "$INDEX" | grep '^UU ' &> /dev/null); then
@@ -121,7 +121,7 @@ function git_compare_version() {
   local INPUT_GIT_VERSION=$1;
   local INSTALLED_GIT_VERSION
   INPUT_GIT_VERSION=(${(s/./)INPUT_GIT_VERSION});
-  INSTALLED_GIT_VERSION=($(git --version 2>/dev/null));
+  INSTALLED_GIT_VERSION=($(command git --version 2>/dev/null));
   INSTALLED_GIT_VERSION=(${(s/./)INSTALLED_GIT_VERSION[3]});
 
   for i in {1..3}; do