1. Install libguestfs-tools
apt install -y libguestfs-tools
dnf install -y libguestfs-tools
2. Shutdown vm
virsh shutdown vm-1
3. Use virt-customize
virt-customize -a /path/to/disk-root.qcow2 --root-password password:password123
4. Try to access vm
virsh console vm-1
or
ssh root@ip-vm-1