+=item --mirror=URL
+
+Create C<LOCATION> by mirroring the public-inbox at C<URL>.
+C<LOCATION> will have a Makefile with a C<make update>
+target to update the external.
+
+=item --epoch=RANGE
+
+Restrict clones of L<public-inbox-v2-format(5)> inboxes to the
+given range of epochs. The range may be a single non-negative
+integer or a (possibly open-ended) C<LOW..HIGH> range of
+non-negative integers. C<~> may be prefixed to either (or both)
+integer values to represent the offset from the maximum possible
+value.
+
+For example, C<--epoch=~0> alone clones only the latest epoch,
+C<--epoch=~2..> clones the three latest epochs.
+
+Default: C<0..~0> or C<0..> or C<..~0>
+(all epochs, all three examples are equivalent)
+
+=item -v
+
+=item --verbose
+
+Provide more feedback on stderr.
+
+=item -q
+
+=item --quiet
+
+Suppress feedback messages.
+
+=back
+
+=head2 MIRRORING
+
+=over
+
+=item --torsocks=auto|no|yes
+
+=item --no-torsocks
+
+Whether to wrap L<git(1)> and L<curl(1)> commands with L<torsocks(1)>.
+
+Default: C<auto>
+
+=item --inbox-version=NUM
+
+Force a public-inbox version (must be C<1> or C<2>).
+
+=back
+
+The following options are passed to L<public-inbox-init(1)>:
+
+=over
+
+=item -j JOBS, --jobs=JOBS
+
+=item -L LEVEL, --indexlevel=LEVEL
+
+=back
+
+The following options are passed to L<public-inbox-index(1)>:
+
+=over
+
+=item --batch-size=SIZE
+
+=item --compact
+
+=item -j JOBS, --jobs=JOBS
+
+=item --max-size=SIZE
+
+=item --sequential-shard
+
+=item --skip-docdata
+