fatal: Could not parse object '990e72db81ccf2c68bba20eebda4eefc890e251b'.
From https://github.com/NASA-Tensegrity-Robotics-Toolkit/NTRTsim
 * branch            master     -> FETCH_HEAD
HEAD is now at 990e72d Updated Doxygen link.
990e72db81ccf2c68bba20eebda4eefc890e251b