You cannot edit the home postion of a moving head.
I am not really sure I understand your problem, but if you have a chase looping and want to avoid the movement from home position to the first cue position, you can create a playback with one cue recording the first cue position? set this cue and your chase to "exclusive' in the 'properties' window.
Start the playback with the one cue, then when you will start your chase, the moving head will already be at the right position and the playback will automatically be release when you start your chase.