diff --git a/README.md b/README.md
index 5372727..64a3cef 100644
--- a/README.md
+++ b/README.md
@@ -103,6 +103,9 @@ git remote prune origin
 
 # see all commits that affected somefile
 git log --follow -- filename
+
+# search code in all history
+git log -S "some_old_varname" --oneline --all
 ```
 
 #### Submitting multiple PRs