Pythonista 3.4 RuntimeError: Subprocesses are not supported on ios

[BSoD]

When I used STASH's GIT, after a bunch of code adjustments, it finally raised this error.

stash: <class 'RuntimeError'>: Subprocesses are not supported on ios
Traceback (most recent call last):
  File "/private/var/mobile/Containers/Shared/AppGroup/62FE27F6-9E3C-4590-A6B4-5F0E44D523B4/Pythonista3/Documents/site-packages/stash/system/shruntime.py", line 546, in exec_py_file
    exec (code, namespace, namespace)
  File "../../../site-packages/stash/bin/git.py", line 757, in <module>
    ns.func(args)
  File "../../../site-packages/stash/bin/git.py", line 502, in git_commit
    sha = porcelain.commit(repo, message=ns.message, author=ns.author).decode()
  File "/private/var/mobile/Containers/Shared/AppGroup/62FE27F6-9E3C-4590-A6B4-5F0E44D523B4/Pythonista3/Documents/site-packages/stash/lib/dulwich/porcelain.py", line 369, in commit
    return r.do_commit(
  File "/private/var/mobile/Containers/Shared/AppGroup/62FE27F6-9E3C-4590-A6B4-5F0E44D523B4/Pythonista3/Documents/site-packages/stash/lib/dulwich/repo.py", line 909, in do_commit
    self.hooks["pre-commit"].execute()
  File "/private/var/mobile/Containers/Shared/AppGroup/62FE27F6-9E3C-4590-A6B4-5F0E44D523B4/Pythonista3/Documents/site-packages/stash/lib/dulwich/hooks.py", line 103, in execute
    ret = subprocess.call([self.filepath] + list(args), cwd=self.cwd)
  File "/var/containers/Bundle/Application/B0A78445-FF06-4D46-9F0F-450329F5D41D/Pythonista3.app/Frameworks/Py3Kit.framework/pylib/subprocess.py", line 346, in call
    with Popen(*popenargs, **kwargs) as p:
  File "/var/containers/Bundle/Application/B0A78445-FF06-4D46-9F0F-450329F5D41D/Pythonista3.app/Frameworks/Py3Kit.framework/pylib/subprocess.py", line 764, in __init__
    raise RuntimeError(f"Subprocesses are not supported on {sys.platform}")
RuntimeError: Subprocesses are not supported on ios

Although I am not sure, under Pythonista 3.3, it is possible to run STASH with Python 3 and use a modified version of GIT. Therefore, there should have been no unsupported issue in the past.

Actually, I don't really care about this issue.
I am just looking for a GIT that supports SSH and can be used in Pythonista 3.4 .