<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def is_repo_instance(cls, path):
 """ Return ``True`` if ``path`` is a source controlled repository. """

        try:
            cls.get_version(path)
            return True
        except subprocess.CalledProcessError:
            # Git returns non-zero status
            return False
        except OSError:
            # Git unavailable?
            return False