+=item --inbox-version=NUM
+
+Force a remote public-inbox version (must be C<1> or C<2>).
+This is auto-detected by default, and this option exists mainly
+for testing.
+
+=item --objstore=DIR
+
+Enables space savings when the remote C<manifest.js.gz>
+includes C<forkgroup> entries as generated by grokmirror 2.x.
+
+If C<DIR> does not start with C</>, C<./>, or C<../>, it is treated
+as relative to the C<DESTINATION> directory. If only C<--objstore=>
+is specified where C<DIR> is an empty string (C<"">), then C<objstore>
+(C<$DESTINATION/objstore>) is the implied value of C<DIR>.
+
+=item --manifest=FILE
+
+When incrementally updating an existing mirror, load the given
+manifest (typically C<manifest.js.gz>) to speed up updates.
+
+If C<FILE> does not start with C</>, C<./>, or C<../>, it is treated
+as relative to the C<DESTINATION> directory. If only C<--manifest=>
+is specified where C<FILE> is an empty string (C<"">), then C<manifest.js.gz>
+(C<$DESTINATION/manifest.js.gz>) is the implied value of C<FILE>.
+
+=item -p
+
+=item --prune
+
+Pass the C<--prune> and C<--prune-tags> flags to L<git-fetch(1)>
+calls on incremental clones.
+
+=item -k
+
+=item --keep-going
+
+Continue as much as possible after an error.
+