Nope. That one didn't work in empty repos. Oh well.

fish_prompt.fish

@@ -730,7 +730,7 @@ function __bobthefish_prompt_git -S -a current_dir -d 'Display the actual git st
     end
   end
 
-  set -l staged  (command git diff-index --cached --no-ext-diff --quiet --exit-code HEAD ^/dev/null; or echo -n "$__bobthefish_git_staged_glyph")
+  set -l staged  (command git diff --cached --no-ext-diff --quiet --exit-code ^/dev/null; or echo -n "$__bobthefish_git_staged_glyph")
   set -l stashed (command git rev-parse --verify --quiet refs/stash >/dev/null; and echo -n "$__bobthefish_git_stashed_glyph")
   set -l ahead   (__bobthefish_git_ahead)