Remove docRoot before clone as we may well clone into a parent directory

tasks/install.gitscript.yml

 ---
 # file: roles/drupal/tasks/install.gitscript.yml
 
+# IMPORTANT: The following should be called but really ONLY for new installs.
+- name: "Make Sure Drupal Root Does Not Yet Exist"
+  file:
+    path: '{{ docRoot }}'
+    state: 'absent'
+
 - name: "Ensure Repository Directory"
   file:
     path: '{{ webRoot }}{{ drupal.src.git.target }}'