Re: [PATCH v3 19/22] resolve_ref(): emit warnings for improperly-formatted references

Jeff King [off-list ref] writes:

I wonder if the right solution is for us to be more picky about what can
be found in $GIT_DIR. Maybe matching all-uppercase, or starting with
"refs/", which I think would match existing convention?

I think we've discussed tightening it a few years ago already.

HEAD, MERGE_HEAD, FETCH_HEAD, etc. all are "^[_A-Z]*$" and it may even be
a good idea to insist "^[_A-Z]*HEAD$" or even "^([A-Z][A-Z]*_)?HEAD$".