$ git clone -n https://src.fedoraproject.org/rpms/gnome-sudoku.git /var/lib/mock/f40-build-2226732-52959/root/chroot_tmpdir/scmroot/gnome-sudoku
Cloning into '/var/lib/mock/f40-build-2226732-52959/root/chroot_tmpdir/scmroot/gnome-sudoku'...
$ git fetch origin efcef5084e4afcd4d52c80b301b79058a12fe54a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gnome-sudoku
 * [new ref]         efcef5084e4afcd4d52c80b301b79058a12fe54a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at efcef50 Update to 45.4