fatal: Could not parse object 'fc6e8a120209bad80059646da1f05e03e961550f'.
From https://github.com/NASA-Tensegrity-Robotics-Toolkit/NTRTsim
 * branch            master     -> FETCH_HEAD
HEAD is now at fc6e8a1 Added license header.
fc6e8a120209bad80059646da1f05e03e961550f