fatal: Could not parse object 'd98ff1ba9fe5f5f20c78625c34089de59b728f0a'.
From https://github.com/NASA-Tensegrity-Robotics-Toolkit/NTRTsim
 * branch            master     -> FETCH_HEAD
HEAD is now at d98ff1b Tightening up the stomach muscles to get rid of swayback.
d98ff1ba9fe5f5f20c78625c34089de59b728f0a