I have opened a bugzilla to get an EPEL8 branch for pdsh [1], and I've also reached out to the current maintainers directly and have not heard anything back.  I am not sure what the next steps are in getting an EPEL8 build of pdsh.  I would be happy to become the maintainer of the EPEL builds for pdsh.

- Trey

[1]: https://bugzilla.redhat.com/show_bug.cgi?id=1960006