[ot][spam][crazy] uploading stuff to blockchains

[Undiscussed Horrific Abuse, One Victim of Many]

in order to check the chunksize, i opened a worktree for the git-annex
branch. git-annex keeps its metadata in a dedicated branch, a
security/integrity problem i have run into.

anyway, this branch is too big to check out at a reasonable speed. i
haven't actually finished a checkout.

a lighter-weight way to check the contents of the branch would be to
use git commands, maybe something like git ls-tree or git cat-file .