fatal: Could not parse object '534effa673b47e53621dbc4b74a375daed7e63df'.
From https://github.com/NASA-Tensegrity-Robotics-Toolkit/NTRTsim
 * branch            master     -> FETCH_HEAD
HEAD is now at 534effa Added auto-yes on apt-get.
534effa673b47e53621dbc4b74a375daed7e63df