Andrew's git / gitweb.git / t/t4013/diff.diff-tree_initial_mode
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t / t4013 / diff.diff-tree_initial_modeon commit rebase --rebase-merges: a "merge" into a new root is a fast-forward (9c85a1c)
   1$ git diff-tree initial mode
   2:100644 100755 01e79c32a8c99c557f0757da7cb6d65b3414466d 01e79c32a8c99c557f0757da7cb6d65b3414466d M      file0
   3$