$ git clone -n https://src.fedoraproject.org/rpms/gnome-sudoku.git /var/lib/mock/f42-build-side-1-3502697-45978/root/chroot_tmpdir/scmroot/gnome-sudoku
Cloning into '/var/lib/mock/f42-build-side-1-3502697-45978/root/chroot_tmpdir/scmroot/gnome-sudoku'...
$ git fetch origin bc31323654a74195e1a9d7520b3da0a2144dd0b6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gnome-sudoku
 * [new ref]         bc31323654a74195e1a9d7520b3da0a2144dd0b6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bc31323 Update to 48.1