diff --git a/git-diff-merge-conflict-resolution b/git-diff-merge-conflict-resolution
index edaa548..c9cd8c5 100755
--- a/git-diff-merge-conflict-resolution
+++ b/git-diff-merge-conflict-resolution
@@ -1,14 +1,3 @@
-#!/usr/bin/env ruby -w
+#!/bin/zsh
 
-treeish = ARGV.shift || 'HEAD'
-output = nil
-loop do
-    puts "git diff-tree --color --cc #{treeish}"
-    output = `git diff-tree --color --cc #{treeish}`
-    len = output.strip.length == 40
-    break if !$?.success? || len == 0 || len == 40
-    treeish = `git log -n1 #{treeish} | head -n2 | tail -n1`.strip.split[1]
-    puts treeish
-    break unless treeish =~ /^[0-9a-f]{7}$/
-end
-puts output
+git diff-tree --color --cc "${1:-HEAD}"
\ No newline at end of file