[Podman] How to build rootfs.tar from RHEL UBI image (pulled with podman)

If I pull a RHEL UBI image like so (On Windows using cygwin and podman), $podman pull registry.access.redhat.com/ubi8/ubi Is there a command I can run on the host system (Windows) to create a file on the host (Windows) that would be a rootfs.tar of the UBI image that was pulled? ------------------------------ I want to then use that rootfs.tar to run on the Windows host under WSL2. If anyone has done this *or if there is another way* to fetch the UBI image as a rootfs.tar, it would be greatly helpful. --- This is something I want to do regularly (pull the latest UBI image, on the day of each new update/release of the image), and run under Windows WSL2. ---