fatal: Could not parse object '189a7f1c6d6bf61889dde7e50222cbe265acdb80'.
From https://github.com/NASA-Tensegrity-Robotics-Toolkit/NTRTsim
 * branch            master     -> FETCH_HEAD
HEAD is now at 189a7f1 Merged in front and changes to TetrahedralSpine from yaml controller branch
189a7f1c6d6bf61889dde7e50222cbe265acdb80