Re: [PATCH] rename_ref(): only print a warning when config-file update fails

Lars Hjemli [off-list ref] writes:

If git_config_rename_section() fails, rename_ref() used to return 1, which
left HEAD pointing to an absent refs/heads file (since the actual renaming
had already occurred).

I wonder if rolling back the rename that was asked is an
option.  We would want to keep these low-level things atomic
whenever possible.