Support the browsing of other Git remotes/branches.

plugins/git/alias.zsh

@@ -182,6 +182,8 @@ alias ghc='git remote prune'
 compdef _git ghc=git-remote
 alias ghs='git remote show'
 compdef _git ghs=git-remote
+alias ghb='git-hub'
+compdef _git-hub ghb=git-hub
 
 # Stash (t)
 alias gta='git stash apply'

plugins/git/completions/_git-hub

@@ -0,0 +1,29 @@
+#compdef git-hub
+#autoload
+
+local state remotes remote branches ret=1
+
+_arguments -C -s -S \
+  '1::args:->remote' \
+  '2::args:->branch' && ret=0
+
+case "$state" in
+  (remote)
+    remotes=($(
+      git config -l \
+        | grep 'remote\.[^.]*\.url' \
+        | cut -d'.' -f2))
+    _describe -t branch 'remotes' remotes && ret=0
+  ;;
+  (branch)
+    remote="$words[(($CURRENT - 1))]"
+    branches=($(
+      git branch -a \
+        | grep "remotes/${remote}" \
+        | sed -e 's/[ \*]*//g' -e "s:remotes/${remote}/::g"
+    ))
+    _describe -t branch 'branches' branches && ret=0
+  ;;
+esac
+
+return $ret

plugins/git/functions/git-hub

@@ -1,12 +1,30 @@
 # Open the GitHub repository in the browser.
-local url=$(
+local remote branches branch current_branch url
+
+remote="${1:-origin}"
+url=$(
   git config -l \
-    | grep "remote.origin.url" \
+    | grep "remote.${remote}.url" \
-    | sed -En "s/remote.origin.url=(git|https?)(@|:\/\/)github.com(:|\/)(.+)\/(.+).git/https:\/\/github.com\/\4\/\5/p"
+    | sed -En "s/remote.${remote}.url=(git|https?)(@|:\/\/)github.com(:|\/)(.+)\/(.+).git/https:\/\/github.com\/\4\/\5/p"
 )
+branches=($(
+  git branch -a \
+    | grep "remotes/${remote}" \
+    | sed -e 's/[ \*]*//g' -e "s:remotes/${remote}/::g"
+))
+current_branch="$(git-branch)"
+branch="${2:-master}"
+
+if [[ -z "$2" ]]; then
+  if (( $branches[(I)$current_branch] != 0 )); then
+    branch="$current_branch"
+  else
+    branch='master'
+  fi
+fi
 
 if [[ -n "$url" ]]; then
-  url="${url}/tree/${$(git-branch):-master}"
+  url="${url}/tree/${branch}"
 
   if (( $+commands[$BROWSER] )); then
     "$BROWSER" "$url"