Put in a reset --hard to clean up

If something goes wrong, we can leave changes in the dir, which makes
switching branches back and starting over hard. If we just reset before
the master checkout, then we can easily run again.

Change-Id: Ie31708b70c87078fbb0ee8c6ddf820715076e71b
diff --git a/jeepyb/cmd/manage_projects.py b/jeepyb/cmd/manage_projects.py
index 0a22f11..a346b20 100644
--- a/jeepyb/cmd/manage_projects.py
+++ b/jeepyb/cmd/manage_projects.py
@@ -551,6 +551,7 @@
                     log.exception(
                         "Exception processing ACLS for %s." % project)
                 finally:
+                    git_command(repo_path, 'reset --hard')
                     git_command(repo_path, 'checkout master')
                     git_command(repo_path, 'branch -D config')