Jeff King [off-list ref] writes:
As as long your "equivalent of" means "branch -d"; we need to kill off
both the ref and its reflogs. And therefore...
...
The one key difference between rewinds and branch deletion is that the
latter will kill off the reflog, making the history inaccessible. You
can always still access rewound or rebased work via the reflog.
Hmm, you are right.
I somehow still had a vague distant memory from late 2006 when we did not
have reflogs for remotes/ hierarchy.