fatal: Could not parse object '21dee3d1f291d705334bd201ef3f40901ce355c9'.
From https://github.com/NASA-Tensegrity-Robotics-Toolkit/NTRTsim
 * branch            master     -> FETCH_HEAD
HEAD is now at 21dee3d Split out doxygen documentation section from about.
21dee3d1f291d705334bd201ef3f40901ce355c9