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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 using_git(cwd):
 """Test whether the directory cwd is contained in a git repository."""

    try:
        git_log = shell_out(["git", "log"], cwd=cwd)
        return True
    except (CalledProcessError, OSError):  # pragma: no cover
        return False