$ git diff-tree --root --abbrev initial
444ac553ac7612cc88969031b02b3767fb8a353a
:000000 040000 0000000... da7a33f... A	dir
:000000 100644 0000000... 01e79c3... A	file0
:000000 100644 0000000... 01e79c3... A	file2
$