$ git clone -n https://src.fedoraproject.org/rpms/gtk4.git /var/lib/mock/f42-build-side-1-3498289-45962/root/chroot_tmpdir/scmroot/gtk4
Cloning into '/var/lib/mock/f42-build-side-1-3498289-45962/root/chroot_tmpdir/scmroot/gtk4'...
$ git fetch origin 01cf1b0ed25bbd2edabfcd3222c7d92292b7c3ef:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gtk4
 * [new ref]         01cf1b0ed25bbd2edabfcd3222c7d92292b7c3ef -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 01cf1b0 Update to 4.18.4