Python 3.7.3 (default, Jul 25 2020, 13:03:44) 
[GCC 8.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import requests
>>> requests.head("git://git.zx2c4.com/cgit.git")
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/anlambert/.virtualenvs/swh/lib/python3.7/site-packages/requests/api.py", line 104, in head
    return request('head', url, **kwargs)
  File "/home/anlambert/.virtualenvs/swh/lib/python3.7/site-packages/requests/api.py", line 61, in request
    return session.request(method=method, url=url, **kwargs)
  File "/home/anlambert/.virtualenvs/swh/lib/python3.7/site-packages/requests/sessions.py", line 542, in request
    resp = self.send(prep, **send_kwargs)
  File "/home/anlambert/.virtualenvs/swh/lib/python3.7/site-packages/requests/sessions.py", line 649, in send
    adapter = self.get_adapter(url=request.url)
  File "/home/anlambert/.virtualenvs/swh/lib/python3.7/site-packages/requests/sessions.py", line 742, in get_adapter
    raise InvalidSchema("No connection adapters were found for {!r}".format(url))
requests.exceptions.InvalidSchema: No connection adapters were found for 'git://git.zx2c4.com/cgit.git'
>>> requests.head("https://git.zx2c4.com/cgit")
<Response [200]>
>>>