How to follow the movement of head with Oculus Quest

Hi,

I developed a VR application, where I load a 3D model at runtime into the scene. During loading, I show the progress wheel bar so that user know that loading is in progress. I implemented progress wheel bar by using Unity UI image with some sprites.  My question is, If during loading, if user move its head how can I make my progress bar to follow the head movement? I am using OVRCameraRig from Oculus integration.