fatal: Could not parse object 'c67fde73d7d16228f80fc8a7bf8c2d4c60e2861a'.
From https://github.com/NASA-Tensegrity-Robotics-Toolkit/NTRTsim
 * branch            master     -> FETCH_HEAD
HEAD is now at c67fde7 Force use of std::size_t for size_t
c67fde73d7d16228f80fc8a7bf8c2d4c60e2861a