Can you update the ssh keys used by podman-machine?

[tim-gp]

I'm trying to switch my podman machine into fips mode, and I think I'm close but enabling fips mode causes podman machine ssh to stop working, I think this is because fips-enabling the machine changes the ssh keys.

$ podman machine ssh
> sudo rpm-ostree install fips-mode-setup
> exit
$ podman machine stop; podman-machine start
$ podman machine ssh
> sudo fips-mode-setup --enable --no-bootcfg
> sudo rpm-ostree kargs --append-if-missing=fips=1
> exit
$ podman machine stop; podman-machine start
   Error: machine did not transition into running state: ssh error: ssh: handshake failed: ssh: unable to authenticate, attempted methods [none publickey], no supported methods remain
$ podman machine ssh
  Connecting to vm podman-machine-default. To close connection, use `~.` or `exit`
core@localhost: Permission denied (publickey,gssapi-keyex,gssapi-with-mic).

Does anyone have ideas on how to fix this?