Re: [PATCH 2/4] glossary: define committish (a.k.a. commit-ish)

Richard Hansen wrote:

+[[def_committish]]committish (also commit-ish)::

Good.

+       A <<def_ref,ref>> pointing to an <<def_object,object>> that
+       can be recursively dereferenced to a
+       <<def_commit_object,commit object>>.
+       The following are all committishes:
+       a ref pointing to a commit object,
+       a ref pointing to a <<def_tag_object,tag object>> that points
+       to a commit object,
+       a ref pointing to a tag object that points to a tag object
+       that points to a commit object, etc.

Is master~3 a committish?  What about :/foomery?  Look at the other
forms in gitrevisions(7); master:quuxery, master^{tree} are notable
exceptions.

Thanks.