I’ve uploaded three new images to https://www.kraxel.org/repos/rpi2/images/.
The fedora-25-rpi3 image is for the raspberry pi 3.
The fedora-25-efi images are for qemu (virt machine type with edk2 firmware).
The images don’t have a root password set. You must use libguestfs-tools to set the root password …
virt-customize -a <image> --root-password "password:<your-password-here>>
… otherwise you can’t login after boot.
The rpi3 image is partitioned simliar to the official (armv7) fedora 25 images: The firmware is on a separate vfat partition for only firmware and uboot (mounted at /boot/fw). /boot is a ext2 filesystem now and holds the kernels only. Well, for compatibility reasons with the f24 images (all images use the same kernel rpms) firmware files are in /boot too, but they are not used. So, if you want tweak something in config.txt, go to /boot/fw not /boot.
The rpi3 images also have swap is commented out in /etc/fstab. The reason is that the swap partition must be reinitialized, because swap partitions generated when running on a 64k pages kernel (CONFIG_ARM64_64K_PAGES=y) are not compatible with 4k pages (CONFIG_ARM64_4K_PAGES=y). This must be fixed, by running “swapon --fixpgsz <device>” once, then you can uncomment the swap line in /etc/fstab.