Hammer on el8 fails during install scl

Fails with:
```bash
TASK [ruby_scl : Install SCL repository] ***************************************
fatal: [centos8-hammer-devel]: FAILED! => changed=false 
  failures:
  - No package centos-release-scl-rh available.
  msg: Failed to install some of the specified packages
  rc: 1
  results: []
```

Will start to look and make a pr