t / t4013 / diff.diff_--raw_--abbrev=4_initialon commit get_packed_ref_cache(): take a `packed_ref_store *` parameter (8e821c3)
   1$ git diff --raw --abbrev=4 initial
   2:100644 100644 35d2... 9929... M        dir/sub
   3:100644 100644 01e7... 10a8... M        file0
   4:000000 100644 0000... b1e6... A        file1
   5:100644 000000 01e7... 0000... D        file2
   6$