fatal: Could not parse object '62ef231fdf0659f76404afbaf2669e6b67cb2f4e'.
From https://github.com/NASA-Tensegrity-Robotics-Toolkit/NTRTsim
 * branch            master     -> FETCH_HEAD
HEAD is now at 62ef231 Fixed virtual machine link.
62ef231fdf0659f76404afbaf2669e6b67cb2f4e