https://bugzilla.redhat.com/show_bug.cgi?id=1605054
--- Comment #10 from fujiwara tfujiwar@redhat.com --- (In reply to Gan Huang from comment #9)
[root@fedora tmp]# rpm -ivh ./mutter-3.28.3-3.1.fc28.src.rpm
You don't have to install source rpm.
# dnf copr enable fujiwara/mutter # dnf update ibus