If you need to get working OpenCL on AMD Navi on Fedora, follow this steps:
sudo dnf -y groupinstall 'RPM Development Tools'
rpmdev-setuptree
cd ~/rpmbuild/SOURCES
wget --referer https://support.amd.com/en-us/kb-articles/Pages/AMDGPU-PRO-Driver-for-Linux-Release-Notes.aspx https://drivers.amd.com/drivers/linux/amdgpu-pro-20.45-1188099-ubuntu-20.04.tar.xz
cd ~/rpmbuild/SPECS
git clone https://github.com/secureworkstation/rpm-amdgpu-pro-opencl amdgpu-pro-opencl
cd amdgpu-pro-opencl
rpmbuild -ba amdgpu-pro-opencl.spec