$ git clone -n https://src.fedoraproject.org/rpms/kf6-kxmlgui.git /var/lib/mock/f40-build-2399381-60549/root/chroot_tmpdir/scmroot/kf6-kxmlgui
Cloning into '/var/lib/mock/f40-build-2399381-60549/root/chroot_tmpdir/scmroot/kf6-kxmlgui'...
$ git fetch origin 7209eefb0a7ff3d74d4859df3e920bf627fd418b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-kxmlgui
 * [new ref]         7209eefb0a7ff3d74d4859df3e920bf627fd418b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7209eef 5.249.0