Dead sew-up tires make good boots, as does a patch of Hypalon(sp?), the stuff they make inflatable boats like Zodiacs out of,
though, yes, Park Tool packages a tire boot which is to be found at retail bike shops.
a Booted tire will get you in from the boonies/outback, then you would consider replacing it,
a sharp object may have the rubber close up around it when extracted to be fine,if no casing carcass is torn.
close inspection is the key.. mend the puncture or replace the tube and go on, then

I have a Conti Travel Contact , similar 2 hole puncture, the sidewall was pierced but the casing was still mostly sound.

but this was a 26-1.75 tire at 50 psi, not a 622-23 at 100 psi.