fatal: Could not parse object '81371e21b1121a2cbfd113baf514841711ec53a3'.
From https://github.com/NASA-Tensegrity-Robotics-Toolkit/NTRTsim
 * branch            master     -> FETCH_HEAD
HEAD is now at 81371e2 Rescaled COM by a factor of 1/10
81371e21b1121a2cbfd113baf514841711ec53a3