Running tests without internet connection

[LecrisUT]

Hi, while trying to package jaraco.context 6.0.1 I'm hitting issues when running the doctests:

________________________ [doctest] context.repo_context ________________________
264 
265     Check out the repo indicated by url.
266 
267     If dest_ctx is supplied, it should be a context manager
268     to yield the target directory for the check out.
269 
270     >>> repo = repo_context('https://github.com/jaraco/jaraco.context')
271     >>> with repo as dest:
UNEXPECTED EXCEPTION: FileNotFoundError(2, 'No such file or directory')
Traceback (most recent call last):
  File "/usr/lib64/python3.9/doctest.py", line 1334, in __run
    exec(compile(example.source, filename, "single",
  File "<doctest context.repo_context[1]>", line 1, in <module>
  File "/usr/lib64/python3.9/contextlib.py", line 119, in __enter__
    return next(self.gen)
  File "/builddir/build/BUILD/jaraco_context-6.0.1/jaraco/context/__init__.py", line 195, in repo_context
    subprocess.check_call(cmd, stdout=stream, stderr=stream)
  File "/usr/lib64/python3.9/subprocess.py", line 368, in check_call
    retcode = call(*popenargs, **kwargs)
  File "/usr/lib64/python3.9/subprocess.py", line 349, in call
    with Popen(*popenargs, **kwargs) as p:
  File "/usr/lib64/python3.9/subprocess.py", line 951, in __init__
    self._execute_child(args, executable, preexec_fn, close_fds,
  File "/usr/lib64/python3.9/subprocess.py", line 1837, in _execute_child
    raise child_exception_type(errno_num, err_msg, err_filename)
FileNotFoundError: [Errno 2] No such file or directory: 'git'
/builddir/build/BUILD/jaraco_context-6.0.1/jaraco/context/__init__.py:271: UnexpectedException

The issue being that it is trying to git clone. This is not something that pytest-enabler is able to resolve right?