Update loose.py

Author: DEKHTIARJonathan

gitdb/db/loose.py

@@ -233,9 +233,10 @@ def store(self, istream):
             # make sure its readable for all ! It started out as rw-- tmp file
             # but needs to be rwrr
             for _ in range(3):
-                suppress(PermissionError):
+                with suppress(PermissionError):
                     chmod(obj_path, self.new_objects_mode)
                     break
+                time.sleep(0.5)
             else:
                 raise PermissionError("Impossible to apply `chmod` to file {}".format(obj_path))
         # END handle dry_run