fix comments

oh-my-zsh.sh

@@ -138,6 +138,14 @@ _omz_git_head() {
 
   if [[ "$head" = ref:\ * ]]; then
     ref="${head#ref: }"
+    case "$ref" in
+      # These namespaces are private to each worktree and are never resolved
+      # from the common directory or its packed-refs file.
+      refs/bisect/*|refs/worktree/*|refs/rewritten/*)
+        [[ -r "$gitdir/$ref" ]] || return 1
+        read -r REPLY 2>/dev/null < "$gitdir/$ref" || return 1
+        ;;
+      *)
         if [[ -r "$common/$ref" ]]; then
           read -r REPLY 2>/dev/null < "$common/$ref" || return 1
         elif [[ -r "$common/packed-refs" ]]; then
@@ -146,6 +154,8 @@ _omz_git_head() {
         else
           return 1
         fi
+        ;;
+    esac
   else
     # detached HEAD: the file holds the commit itself
     REPLY="$head"