I am dealing with this now. Double click on a shot in your bin or timeline. Go to master effects on scroll down to the output transform settings. Change color space to RedWide Gamut and your gamma curve to LOG3G10. That will give you a raw setting you can apply your LUT to.
Kindest regards,
Chris Gomersall
gomersall.chris@gmail.com
be.net/chrisgomersall