When running rosinstall for Electric on OS X I get this error when it gets to kdlclone:
Cloning into /Users/william/devel/ros/electric/orocos_kinematics_dynamics...
remote: Counting objects: 2284, done.
remote: Compressing objects: 100% (885/885), done.
remote: Total 2284 (delta 1496), reused 2092 (delta 1363)
Receiving objects: 100% (2284/2284), 667.50 KiB | 381 KiB/s, done.
Resolving deltas: 100% (1496/1496), done.
fatal: Cannot setup tracking information; starting point is not a branch.
ERROR: Failed to install tree '/Users/william/devel/ros/electric/orocos_kinematics_dynamics'
vcs not setup correctly