Fix the "detached head" of the submodule issue.

Hopefully.

bin/clone_courses.sh

@@ -10,12 +10,10 @@ cd ..
 echo -e "Creating backup of pages in ${BACKUP}"
 mv ${COURSES_DIR} ${BACKUP}
 
-#COURSES_DIR="user/pages/03.courses"
-#
-#rm ${COURSES_DIR}
-
-# shallow? (perhaps we should use a submodule anyways)
-#git clone ssh://git@m3p2.ljbac.com:10022/m3p2/courses.git ${COURSES_DIR}
 
+echo -e "Fetching fresh courses from server…"
 git submodule update --init --recursive
+git submodule foreach git checkout master
 git submodule foreach git pull origin master
+
+echo -e "Done!"