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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def is_git_file(cls, path, name):
 """Determine if file is known by git."""

        os.chdir(path)
        p = subprocess.Popen(['git', 'ls-files', '--error-unmatch', name],
                             stdout=subprocess.PIPE, stderr=subprocess.PIPE)
        p.wait()
        return p.returncode == 0