fatal: Could not parse object '6fb45a7b18ad1b96b6753bfab0a48ceb3d47af34'.
From https://github.com/NASA-Tensegrity-Robotics-Toolkit/NTRTsim
 * branch            master     -> FETCH_HEAD
HEAD is now at 6fb45a7 Another model for controller experiments
6fb45a7b18ad1b96b6753bfab0a48ceb3d47af34