fatal: Could not parse object '54e41eee0196dfb0ff0b21bdb257f9e55e923345'.
From https://github.com/NASA-Tensegrity-Robotics-Toolkit/NTRTsim
 * branch            master     -> FETCH_HEAD
HEAD is now at 54e41ee Vertical Spine Structure with new cable colliding with rigid bodies
54e41eee0196dfb0ff0b21bdb257f9e55e923345