Once in the Safari Remote Web Inspector, set a breakpoint to right after you get the deviceready event.
Then go to the Log tab

Then type in to reload the page:
window.location.reload()

Unfortunately you have to set a breakpoint after deviceready first because our deviceready handling has a timeout -- then you can set breakpoints after this normally.

You can fake a deviceready event however by typing this into the console:

cordova.fireDocumentEvent('deviceready');


Thanks "Shazron Abdullah"