Can I shorten branch names in my terminal in fish

My question is basically this, but for fish, as the solution given there does not apply for this

Currently my fish terminal often looks like

><> ~r/f/d/config on LONG_APP_NAME_RELEASE_CANDIDATE_1_4 x           16:55:12

So it leaves little space for me to actually type in. anyone have any ideas on how to fix this, to maybe look like this:

><> ~r/f/d/config on LONG_A...1_4 x                                   16:55:12

As @glenn proposed in the comments, i typed out type fish_prompt

and got a function

  1 fish_prompt is a function with definition  2 # Defined in /Users/mge/.config/fish/functions/fish_prompt.fish @ line 5  3 function fish_prompt  4   set -l last_command_status $status  5   set -l cwd  6   7   if test "$theme_short_path" = 'yes'  8     set cwd (basename (prompt_pwd))  9   else 10     set cwd (prompt_pwd) 11   end 12  13   set -l fish     "⋊>" 14   set -l ahead    "↑" 15   set -l behind   "↓" 16   set -l diverged "⥄" 17   set -l dirty    "⨯" 18   set -l none     "◦" 19  20   set -l normal_color     (set_color normal) 21   set -l success_color    (set_color $fish_pager_color_progress 2> /dev/null    ; or set_color cyan) 22   set -l error_color      (set_color $fish_color_error 2> /dev/null; or set_    color red --bold) 23   set -l directory_color  (set_color $fish_color_quote 2> /dev/null; or set_    color brown) 24   set -l repository_color (set_color $fish_color_cwd 2> /dev/null; or set_co    lor green) 25  26   if test $last_command_status -eq 0 27     echo -n -s $success_color $fish $normal_color 28   else 29     echo -n -s $error_color $fish $normal_color 30   end 31  32   if git_is_repo 33     if test "$theme_short_path" = 'yes' 34       set root_folder (command git rev-parse --show-toplevel 2> /dev/null) 35       set parent_root_folder (dirname $root_folder) 36       set cwd (echo $PWD | sed -e "s|$parent_root_folder/||") 37     end 38  39     echo -n -s " " $directory_color $cwd $normal_color 40     echo -n -s " on " $repository_color (git_branch_name) $normal_color " " 41  42     if git_is_touched 43       echo -n -s $dirty 44     else 45       echo -n -s (git_ahead $ahead $behind $diverged $none) 46     end 47   else 48     echo -n -s " " $directory_color $cwd $normal_color 49   end 50  51   echo -n -s " " 52 end

This is almost giving me the right idea to solve this, however i don't speak fish so i am not sure how i would edit this