fatal: Could not parse object '6c33f1b309c9d8c849de8504e35ac50ecf13a740'.
From https://github.com/NASA-Tensegrity-Robotics-Toolkit/NTRTsim
 * branch            master     -> FETCH_HEAD
HEAD is now at 6c33f1b Merge branch 'master' of github.com:NASA-Tensegrity-Robotics-Toolkit/NTRTsim
6c33f1b309c9d8c849de8504e35ac50ecf13a740