README.md in rebuild-0.2.3 vs README.md in rebuild-0.2.4

@@ -33,9 +33,13 @@
 Then executes all of `/tmp/k0kubun/dotfiles/*.sh`.
 
 ## Options
 
 ```bash
+# By default, git pull is not executed.
+# If you want to synchronize repository before running scripts, add -f.
+$ rebuild -f
+
 # Repository will be cloned to ~/src/github.com/k0kubun/dotfiles
 $ rebuild -d ~/src/github.com/k0kubun/dotfiles
 
 # Run /tmp/k0kubun/dotfiles/script/*.sh instead of /tmp/k0kubun/dotfiles/*.sh
 $ rebuild -s script