fatal: Could not parse object '42760e7ba3c96ddf0dce52cdf1d2a3b88f2d2e48'.
From https://github.com/NASA-Tensegrity-Robotics-Toolkit/NTRTsim
 * branch            master     -> FETCH_HEAD
HEAD is now at 42760e7 forgot the spiral muscles!
42760e7ba3c96ddf0dce52cdf1d2a3b88f2d2e48