The URL https://git.io/this-time-for-real-tho links to the win10-usb.sh
script below. It created something bootable from my Fedora 29 workstation.
Try to run
curl -L https://git.io/this-time-for-real-tho | sh
and if that doesn't work try explicitly setting an environment variable for the location of the .iso
file
curl -L https://git.io/this-time-for-real-tho | target_iso='/path/to/wherever/you/put/the/darn.iso' sh
This will likely take quite a while to finish.