$ git clone -n https://src.fedoraproject.org/rpms/gnome-sudoku.git /var/lib/mock/f39-build-1560344-37337/root/chroot_tmpdir/scmroot/gnome-sudoku
Cloning into '/var/lib/mock/f39-build-1560344-37337/root/chroot_tmpdir/scmroot/gnome-sudoku'...
$ git fetch origin 0f40f148184e43f8885e4087ca192b52318f6ad2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gnome-sudoku
 * [new ref]         0f40f148184e43f8885e4087ca192b52318f6ad2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0f40f14 Update to 45.2