The "where'd it come from" clause can terminate successfully at the genesis of time proper, to define a time prior to time is to posit a time where there was still time, ergo...
"Big guy in the sky was hanging around in void and created it all" posits nothing about the nature of time, and in fact infers that time is eternal and has always been, as big guy in the sky is eternal and has always been, that's why it's not logically inconsistent to point out that the god hypothesis simply raises more questions whilst taking a competing theory to the genesis of time proper does not fail in the same way.
By what method did the color blue arrive at it's current physical location in space, also, what does it taste like?
I realise the above sounds cryptic but I'm just trying to give examples of how concepts are intrinsic to their own space to a certain degree, time as a spatial dimension of the universe terminates by definition at the genesis of the universe, so what came "before" has no more meaning than the taste of the color blue.
"Big guy in the sky was hanging around in void and created it all" posits nothing about the nature of time, and in fact infers that time is eternal and has always been, as big guy in the sky is eternal and has always been, that's why it's not logically inconsistent to point out that the god hypothesis simply raises more questions whilst taking a competing theory to the genesis of time proper does not fail in the same way.