$ git clone -n https://src.fedoraproject.org/rpms/gnome-sudoku.git /var/lib/mock/f40-build-793106-138786/root/chroot_tmpdir/scmroot/gnome-sudoku
Cloning into '/var/lib/mock/f40-build-793106-138786/root/chroot_tmpdir/scmroot/gnome-sudoku'...
$ git fetch origin 8ae46be7b27d038cdaa879a3ec4b7ded82e6984c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gnome-sudoku
 * [new ref]         8ae46be7b27d038cdaa879a3ec4b7ded82e6984c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8ae46be Update to 46.beta