In 8a0e03f7baf4 (remotefilelog: move most setup from onetimesetup() to
uisetup(), 2019-05-01), I said:
All the wrappers moved in this patch check if remotefilelog is enabled before they change behavior, so it's safe to always wrap.
That was clearly a lie, because getrenamedfn() didn't. That made
e.g. hg log -T {file_copies} unbearably slow. This patch fixes that.