fatal: Could not parse object '66eac275b51760fec91b224b28b75d3069ea6fdf'.
From https://github.com/NASA-Tensegrity-Robotics-Toolkit/NTRTsim
 * branch            master     -> FETCH_HEAD
HEAD is now at 66eac27 first draft of vertical spine bending controller
66eac275b51760fec91b224b28b75d3069ea6fdf