tree-diff: convert diff_root_tree_sha1 to struct object_id
[git] / contrib / credential /
drwxr-xr-x   ..
drwxr-xr-x - gnome-keyring
drwxr-xr-x - libsecret
drwxr-xr-x - netrc
drwxr-xr-x - osxkeychain
drwxr-xr-x - wincred