fatal: Could not parse object '3b31588ffda78449daeb0ddd10fbf6eb7a3666bd'.
From https://github.com/NASA-Tensegrity-Robotics-Toolkit/NTRTsim
 * branch            master     -> FETCH_HEAD
HEAD is now at 3b31588 Minor refactoring of SpineHardware/VerticalSpine model file in preparation for switching over to pretension from setRestLengthSingleStep.
3b31588ffda78449daeb0ddd10fbf6eb7a3666bd