refs.c: add a function to append a reflog entry to a fd

[git] / t / t4013 / diff.diff-tree_--cc_--stat_master

$ git diff-tree --cc --stat master
59d314ad6f356dd08601a4cd5e530381da3e3c64
 dir/sub | 2 ++
 file0   | 3 +++
 2 files changed, 5 insertions(+)
$