reflog: weird options

The manual for git reflog says it takes "[log-options]". And it does, sort-of. For instance, you can give a path, and it will only show you reflog entries that touch that path (I'm not sure why you would want to do that, but you can!). But you can also give --merges, which will silently give you no reflog entries. I don't know why.

One useful option that may or may not exist: show the time the reflog
entry was made.  I'd really like to say, "well, I know it was working
as-of last Tuesday...".  I know the data is in the reflog, but I don't
know how to show it.  I can show the committer date, which is usually
good enough when I'm rewriting a patch series, but that is not quite
the same thing.
 
I know I could fix these issues, but unfortunately I don't have the
time right now. It might make a good starter project for someone new to
git development!