Explain do_clone in docstring, that includes pull to update

install.py

@@ -73,7 +73,7 @@ class Installer:
     def do_clone(
         self, url: str, dest: str, branch: str = "master", condition: str = "true"
     ) -> None:
-        """Do the git clone."""
+        """Clone if new, remove and clone if force, pull if update."""
 
         if not self.evaluate_condition(condition):
             ui.info_2("Skipping", url)