Endless loop when running wstool up -j8

[jones5322]

I am following your instructions. When I get to the command above the system appears to go into an endless loop and keeps repeating, "[moveit_simple_grasps,ros_book] still active"

andrew@dv4-1412:~/dev/catkin_ws/src$ wstool up -j8
[moveit_simple_grasps,ros_book] still active
[moveit_simple_grasps] Fetching git@github.com:efernandez/moveit_simple_grasps.git (version None) to /home/andrew/dev/catkin_ws/src/moveit_simple_grasps
[ros_book] Fetching git@github.com:rosbook/effective_robotics_programming_with_ros.git (version None) to /home/andrew/dev/catkin_ws/src/ros_book
Cloning into '/home/andrew/dev/catkin_ws/src/moveit_simple_grasps'...
Cloning into '/home/andrew/dev/catkin_ws/src/ros_book'...
The authenticity of host 'github.com (192.30.253.113)' can't be established.
RSA key fingerprint is SHA256:nThbg6kXUpJWGl7E1IGOCspRomTxdCARLviKw6E5SY8.
Are you sure you want to continue connecting (yes/no)? The authenticity of host 'github.com (192.30.253.113)' can't be established.
RSA key fingerprint is SHA256:nThbg6kXUpJWGl7E1IGOCspRomTxdCARLviKw6E5SY8.
Are you sure you want to continue connecting (yes/no)? [moveit_simple_grasps,ros_book] still active
[moveit_simple_grasps,ros_book] still active
[moveit_simple_grasps,ros_book] still active
[moveit_simple_grasps,ros_book] still active
[moveit_simple_grasps,ros_book] still active