t / t4013 / diff.diff-tree_initial_modeon commit t6044: add a testcase for index matching head, when head doesn't match HEAD (cf69f2a)
   1$ git diff-tree initial mode
   2:100644 100755 01e79c32a8c99c557f0757da7cb6d65b3414466d 01e79c32a8c99c557f0757da7cb6d65b3414466d M      file0
   3$