I didn't know this move, which is humble in appearance, but this position has been tried many times by strong players, although overwhelmingly in rapid or blitz games.
1. c2c4  1... g8f6  2. g1f3  2... e7e6  3. g2g3  3... d7d5  4. f1g2  4... f8e7  5. e1g1  5... e8g8 