docs(readme): Update usage help info

README.md

@@ -64,6 +64,7 @@ available here: https://github.com/emacs-mirror/emacs
 
 Options:
     -j, --parallel COUNT             Compile using COUNT parallel processes (detected: 8)
+        --git-sha SHA                Override detected git SHA of specified branch allowing builds of old commits
         --[no-]xwidgets              Enable/disable XWidgets (default: enabled)
         --[no-]native-comp           Enable/disable native-comp (default: enabled if supported)
         --[no-]native-fast-boot      Enable/disable NATIVE_FAST_BOOT (default: enabled if native-comp supported)

build-emacs-for-macos

@@ -543,17 +543,17 @@ if __FILE__ == $PROGRAM_NAME
       Options:
     DOC
 
-    opts.on('--git-sha=SHA', 'Override detected git SHA of specified branch ' \
-                             'allowing builds of old commits') do |v|
-      cli_options[:git_sha] = v
-    end
-
     opts.on('-j', '--parallel COUNT',
             'Compile using COUNT parallel processes ' \
             "(detected: #{cli_options[:parallel]})") do |v|
       cli_options[:parallel] = v
     end
 
+    opts.on('--git-sha SHA', 'Override detected git SHA of specified branch ' \
+                             'allowing builds of old commits') do |v|
+      cli_options[:git_sha] = v
+    end
+
     opts.on('--[no-]xwidgets',
             'Enable/disable XWidgets ' \
             '(default: enabled)') do |v|