Johannes Schindelin [off-list ref] writes:
Since "git log origin/master" uses dwim_log() to match
"refs/remotes/origin/master", it makes sense to do that for
"git log --reflog", too.
This is a bit sad.
When there is remotes/origin/HEAD symref that points at
remotes/origin/master (and usually there is, in a repository
initialized with the current git-clone), you can say "git log
origin". Even with this patch, I do not think dwim_log would
allow you to say "git log -g origin" to mean "git log -g
origin/master".