Reproduction: Use /srv/storage/space/mirrors/gitorious.org/mnt/repositories/opensuse/kernel-source.git
```
repo = 'kernel-source.git'
origin_url = 'http://opensuse/kernel-source.git'
import logging
logging.basicConfig(level=logging.DEBUG)
from swh.loader.git.tasks import LoadDiskGitRepository
t = LoadDiskGitRepository()
t.run(origin_url=origin_url, directory=repo, date='2016-05-03T15:16:32+00:00')
```
output:
```
DEBUG:swh.scheduler.task.LoadDiskGitRepository:Creating git origin for http://opensuse/kernel-source.git
DEBUG:swh.scheduler.task.LoadDiskGitRepository:Done creating git origin for http://opensuse/kernel-source.git
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/home/tony/work/inria/repo/swh/swh-environment/swh-scheduler/swh/scheduler/task.py", line 35, in run
raise e from None
File "/home/tony/work/inria/repo/swh/swh-environment/swh-scheduler/swh/scheduler/task.py", line 32, in run
result = self.run_task(*args, **kwargs)
File "/home/tony/work/inria/repo/swh/swh-environment/swh-loader-git/swh/loader/git/tasks.py", line 39, in run_task
return loader.load(origin_url, directory, dateutil.parser.parse(date))
File "/home/tony/work/inria/repo/swh/swh-environment/swh-loader-git/swh/loader/git/base.py", line 422, in load
self.fetch_data()
File "/home/tony/work/inria/repo/swh/swh-environment/swh-loader-git/swh/loader/git/loader.py", line 48, in fetch_data
type_name = self.repo[oid].type_name
File "/usr/lib/python3/dist-packages/dulwich/repo.py", line 472, in __getitem__
return self.object_store[name]
File "/usr/lib/python3/dist-packages/dulwich/object_store.py", line 119, in __getitem__
return ShaFile.from_raw_string(type_num, uncomp, sha=sha)
File "/usr/lib/python3/dist-packages/dulwich/objects.py", line 393, in from_raw_string
obj.set_raw_string(string, sha)
File "/usr/lib/python3/dist-packages/dulwich/objects.py", line 305, in set_raw_string
self.set_raw_chunks([text], sha)
File "/usr/lib/python3/dist-packages/dulwich/objects.py", line 310, in set_raw_chunks
self._deserialize(chunks)
File "/usr/lib/python3/dist-packages/dulwich/objects.py", line 761, in _deserialize
raise ObjectFormatException(e)
dulwich.errors.ObjectFormatException: invalid literal for int() with base 10: b'Thu Oct 30 17:30:06 2014'
```