t / t4013 / diff.diff-tree_-c_--stat_masteron commit shallow.c: the 8 steps to select new commits for .git/shallow (58babff)
   1$ git diff-tree -c --stat master
   259d314ad6f356dd08601a4cd5e530381da3e3c64
   3 dir/sub | 2 ++
   4 file0   | 3 +++
   5 2 files changed, 5 insertions(+)
   6$