There's no current way to retrieve blobs by OID directly
from remote externals. Maybe the $INBOX_NAME/$OID/s/raw.eml
endpoint could be overloaded for that.
=head1 DESCRIPTION
Display a git blob. The blob may correspond to a message from the
=head1 DESCRIPTION
Display a git blob. The blob may correspond to a message from the
-local store, an existing blob in the current repository, or a
-not-yet-created blob in the current git project repository (if any)
-that can be reconstructed from a message.
+local store, any local external, or blobs associated with a
+project git repository (if run from a git (working) directory).
+For blobs which do not exist, it will attempt to recreate the blob
+using patch emails.
+=item --remote
+
+Remote externals only get queried when the blob needs to be
+reconstructed from patch emails.