# grab image
wget https://dl.fedoraproject.org/pub/alt/risc-v/disk_images/Fedora-Developer-37-20221130.n.0.SiFive.Unmatched/Fedora-Developer-37-20221130.n.0-nvme.raw.img.xz

# unpack
xz -d Fedora-Developer-37-20221130.n.0-nvme.raw.img.xz

# create resized image (128G):
modprobe nbd max_part=8
dd if=/dev/zero of=fed64gc_37.raw.img bs=1 count=0 seek=128G
qemu-nbd -f raw --connect=/dev/nbd1 ./Fedora-Developer-37-20221130.n.0-nvme.raw.img
qemu-nbd -f raw --connect=/dev/nbd2 ./fed64gc_37.raw.img
echo -e "p\nq" | fdisk /dev/nbd1	# list partitions
fdisk /dev/nbd2				# create partitions similar to nbd1
	# g (create empty gpt disk label)
	# n <cr> <cr> +700M (create first partition)
	# n <cr> <cr> <cr>  (create second partition)
	# w (save and exit)
mkfs.ext4 /dev/nbd2p1
mkfs.ext4 /dev/nbd2p2
mkdir foo bar
mount /dev/nbd1p1 foo
mount /dev/nbd2p1 bar
cp foo/initramfs* .	# grab initrd
cp foo/vmlinuz* .	# grab kernel (appears gzip compressed Image, a.k.a. Image.gz)
rsync -a foo/ bar/
umount foo
umount bar
blkid /dev/nbd2p*	# grab UUID of "/boot" and "/" partitions (*not* PARTUUID!)
mount /dev/nbd1p2 foo
mount /dev/nbd2p2 bar
rsync -a foo/ bar/
umount foo
vi bar/etc/fstab	# replace UUIDs of "/boot" and "/" with above
umount bar
rmdir foo bar
qemu-nbd --disconnect /dev/nbd1
qemu-nbd --disconnect /dev/nbd2
modprobe -r nbd

# create virtual machine:
mv vmlinuz-6.0.10-300.0.riscv64.fc37.riscv64 Image-6.0.10-300.0.riscv64.fc37.riscv64.gz
gunzip Image-6.0.10-300.0.riscv64.fc37.riscv64.gz
mv initramfs-* /var/lib/libvirt/images/fv64gc/
mv Image-* /var/lib/libvirt/images/fv64gc/
mv fed64gc_37.raw.img /var/lib/libvirt/images/fv64gc/
# edit fv64gc.xml to update initramfs, Image, and the root partition UUID on cmdline
virsh define fv64gc.xml

# add "systemd.unit=multi-user.target enforcing=0" to cmdline on first boot;
#   run `systemctl set-default multi-user.target; restorecon -Rp /` on first login!!!
#   then restore cmdline to its original form...