This script assumes a web root and working directory of /var/www and a drupal root of /var/www/repo.
cd repo
drush dl commerce_kickstart
cd profiles/commerce_kickstart
projects[drupal][version]
projects[drupal][type] = "core"
projects[drupal][download][type] = "git"
projects[drupal][download][url] = "https://github.com/pantheon-systems/drops-7.git"
./scripts/build.sh -y /var/www/repo-new
cd ../../../
mv repo/BUILD.md repo-new/
mv repo/.git repo-new/
rm -fr repo/*
mv repo-new/* repo/
mv repo-new/.* repo/