fatal: Could not parse object '212c9983e9be42ed7680c283af2d044b7d65c729'.
From https://github.com/NASA-Tensegrity-Robotics-Toolkit/NTRTsim
 * branch            master     -> FETCH_HEAD
HEAD is now at 212c998 Minor changes to test asymmetric masS
212c9983e9be42ed7680c283af2d044b7d65c729