README.md in reevoocop-0.0.3 vs README.md in reevoocop-0.0.4

@@ -24,9 +24,22 @@
 ```ruby
 require 'reevoocop/rake_task'
 ReevooCop::RakeTask.new(:reevoocop)
 ```
 
+Or to only have it lint files after the specified commit:
+
+```ruby
+task :reevoocop do
+  exit 27 unless system("reevoocop #{files_that_changed_since_t_minus_0}")
+end
+
+def files_that_changed_since_t_minus_0
+  `git diff-tree --no-commit-id --name-only -r 19c297ff4a91b47c9af735a935c72ea5a2f05791 HEAD`
+    .split("\n").select { |f| f.match(/(rb\z)/) && File.exist?(f) }.join(' ')
+end
+```
+
 In your shell
 ```
 $ reevoocop
 ```