+ git clone --recursive --depth=1 https://github.com/OSCPU/NutShell NutShell Cloning into 'NutShell'... Submodule 'difftest' (https://github.com/OpenXiangShan/difftest.git) registered for path 'difftest' Cloning into '/var/jenkins_home/workspace/NutShell/NutShell/difftest'... Submodule path 'difftest': checked out '4ee1078f03c25ffe317d654a16cc814c7573151d'