$ git clone -n https://src.fedoraproject.org/rpms/mutter.git /var/lib/mock/f41-build-854320-166844/root/chroot_tmpdir/scmroot/mutter
Cloning into '/var/lib/mock/f41-build-854320-166844/root/chroot_tmpdir/scmroot/mutter'...
$ git fetch origin 29cb848d0bc786d67ff7d315d4ecf82326b18863:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mutter
 * [new ref]         29cb848d0bc786d67ff7d315d4ecf82326b18863 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 29cb848 Enable xwayland-native scaling for complete fractional scaling support