Download the source code from https://supercollider.github.io/

Install some requirements:

sudo dnf install avahi-devel emacs emacs-devel libXt-devel libudev-devel libsndfile-devel jack-audio-connection-kit-devel qt5-qtwebengine-devel

I was getting errors like

CMake Error at /usr/lib64/cmake/Qt5/Qt5Config.cmake:28 (find_package):
Could not find a package configuration file provided by "Qt5Svg" with any
of the following names:

Qt5SvgConfig.cmake
qt5svg-config.cmake

sudo dnf install qt5-qtsvg-devel qt5-qtwebsockets-devel

…everything worked OK:

cmake .
make
sudo make install

and run

scide