They've patched their Xorg sources to no longer require this package.
docker run --volume ${CURDIR}/rpmbuild:/home/rpm/rpmbuild --interactive --rm tigervnc/${DOCKER} \
bash -e -x -c "
sudo dnf install -y xorg-x11-server-devel
- sudo dnf install -y https://kojihub.stream.centos.org/kojifiles/packages/xorg-x11-font-utils/7.5/53.el9/x86_64/xorg-x11-font-utils-7.5-53.el9.x86_64.rpm
sudo dnf builddep -y ~/rpmbuild/SPECS/tigervnc.spec
sudo chown 0.0 ~/rpmbuild/SOURCES/*
sudo chown 0.0 ~/rpmbuild/SPECS/*
BuildRequires: libXinerama-devel, mesa-libGL-devel, libxshmfence-devel
BuildRequires: pixman-devel, libdrm-devel,
BuildRequires: xorg-x11-util-macros, xorg-x11-xtrans-devel, libXtst-devel
-BuildRequires: xorg-x11-font-utils
BuildRequires: libXfont2-devel
# SELinux
BuildRequires: libselinux-devel, selinux-policy-devel, systemd