Poetry mangles `GIT_TRACE` information on `'python', '-mpip', 'install', '.'` installation via pre-commit

• Poetry version:
• Python version:
• OS version and name:
• pyproject.toml:

• I am on the latest stable Poetry version, installed using a recommended method.
• I have searched the issues of this repo and believe that this is not a duplicate.
• I have consulted the FAQ and blog for any relevant entries or release notes.
• If an exception occurs when executing a command, I executed it again in debug mode (-vvv option) and have included the output below.

Issue

Using pre-commit to install isort (5.12.0), while also having set:

  GIT_TRACE: 2
  GIT_TRACE_PACKET: 1
  GIT_CURL_VERBOSE: 1

leads to:

[INFO] Installing environment for https://github.com/pycqa/isort.
[INFO] Once installed this environment will be reused.
[INFO] This may take a few minutes...
An unexpected error has occurred: CalledProcessError: command: ('/other_root/.cache/pre-commit/repo6q5zpyem/py_env-python3/bin/python', '-mpip', 'install', '.')
return code: 1
stdout:
    Processing /other_root/.cache/pre-commit/repo6q5zpyem
      Installing build dependencies: started
      Installing build dependencies: finished with status 'done'
      Getting requirements to build wheel: started
      Getting requirements to build wheel: finished with status 'done'
      Preparing metadata (pyproject.toml): started
      Preparing metadata (pyproject.toml): finished with status 'done'
    Building wheels for collected packages: isort
      Building wheel for isort (pyproject.toml): started
      Building wheel for isort (pyproject.toml): finished with status 'error'
    Failed to build isort
stderr:
      error: subprocess-exited-with-error
      
      × Building wheel for isort (pyproject.toml) did not run successfully.
      │ exit code: 1
      ╰─> [30 lines of output]
          Traceback (most recent call last):
            File "/other_root/.cache/pre-commit/repo6q5zpyem/py_env-python3/lib/python3.9/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 353, in <module>
              main()
            File "/other_root/.cache/pre-commit/repo6q5zpyem/py_env-python3/lib/python3.9/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 335, in main
              json_out['return_val'] = hook(**hook_input['kwargs'])
            File "/other_root/.cache/pre-commit/repo6q5zpyem/py_env-python3/lib/python3.9/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 251, in build_wheel
              return _build_backend().build_wheel(wheel_directory, config_settings,
            File "/tmp/pip-build-env-pcn6g6fq/overlay/lib/python3.9/site-packages/poetry/core/masonry/api.py", line 56, in build_wheel
              return WheelBuilder.make_in(
            File "/tmp/pip-build-env-pcn6g6fq/overlay/lib/python3.9/site-packages/poetry/core/masonry/builders/wheel.py", line 85, in make_in
              wb.build(target_dir=directory)
            File "/tmp/pip-build-env-pcn6g6fq/overlay/lib/python3.9/site-packages/poetry/core/masonry/builders/wheel.py", line 121, in build
              self._copy_module(zip_file)
            File "/tmp/pip-build-env-pcn6g6fq/overlay/lib/python3.9/site-packages/poetry/core/masonry/builders/wheel.py", line 232, in _copy_module
              to_add = self.find_files_to_add()
            File "/tmp/pip-build-env-pcn6g6fq/overlay/lib/python3.9/site-packages/poetry/core/masonry/builders/builder.py", line 198, in find_files_to_add
              if self.is_excluded(
            File "/tmp/pip-build-env-pcn6g6fq/overlay/lib/python3.9/site-packages/poetry/core/masonry/builders/builder.py", line 144, in is_excluded
              if exclude_path.as_posix() in self.find_excluded_files(fmt=self.format):
            File "/tmp/pip-build-env-pcn6g6fq/overlay/lib/python3.9/site-packages/poetry/core/masonry/builders/builder.py", line 112, in find_excluded_files
              vcs_ignored_files = set(vcs.get_ignored_files())
            File "/tmp/pip-build-env-pcn6g6fq/overlay/lib/python3.9/site-packages/poetry/core/vcs/git.py", line 340, in get_ignored_files
              output = self.run(*args)
            File "/tmp/pip-build-env-pcn6g6fq/overlay/lib/python3.9/site-packages/poetry/core/vcs/git.py", line 372, in run
              subprocess.check_output(
            File "/usr/lib/python3.9/subprocess.py", line 424, in check_output
              return run(*popenargs, stdout=PIPE, timeout=timeout, check=True,
            File "/usr/lib/python3.9/subprocess.py", line 528, in run
              raise CalledProcessError(retcode, process.args,
          subprocess.CalledProcessError: Command '['git', '--git-dir', '16:25:51.242690 git.c:444               trace: built-in: git rev-parse --show-toplevel\n/other_root/.cache/pre-commit/repo6q5zpyem/.git', '--work-tree', '16:25:51.242690 git.c:444               trace: built-in: git rev-parse --show-toplevel\n/other_root/.cache/pre-commit/repo6q5zpyem', 'ls-files', '--others', '-i', '--exclude-standard']' returned non-zero exit status 128.
          [end of output]
      
      note: This error originates from a subprocess, and is likely not a problem with pip.
      ERROR: Failed building wheel for isort
    ERROR: Could not build wheels for isort, which is required to install pyproject.toml-based projects
Check the log at /other_root/.cache/pre-commit/pre-commit.log
Error occurred ($?:3):

(Sounds like pip's https://github.com/pypa/pip/issues/7545 et al.)

Start in poetry/core/vcs/git.py, especially get_ignored_files() and run(), using the traceback as the entry point. Reproduce the pre-commit installation with GIT_TRACE, GIT_TRACE_PACKET, and GIT_CURL_VERBOSE enabled. Done means Git trace output is not inserted into the git path arguments and the installation completes successfully.