Add cleaning data between checkouts

athena_data.py

@@ -197,7 +197,8 @@ class NewDataset(datasets.GeneratorBasedBuilder):
                     try:
                         # Otherwise, parse the project
                         g = Git(repo_path)
-                        g.checkout(commit, force=True)
+                        g.clean(force=True, d=True)
+                        g.checkout(commit)
                     except Exception as e:
                         print(e)
                         continue