doc: fetch: document `--filter=<filter-spec>` option

The `--filter=<filter-spec>` option is documented in most commands that
support it except `git fetch`.

Let's fix that and document that option properly in the same way as it
is already documented for `git clone`.

Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/Documentation/fetch-options.adoc b/Documentation/fetch-options.adoc
index fcba46ee9e5d61c90297d3563187618571ed8a12..70a981833146669f7a248d7b83cb1ab9373a8369 100644 (file)
--- a/Documentation/fetch-options.adoc
+++ b/Documentation/fetch-options.adoc
@@ -88,6 +88,16 @@ linkgit:git-config[1].
 This is incompatible with `--recurse-submodules=(yes|on-demand)` and takes
 precedence over the `fetch.output` config option.
 
+--filter=<filter-spec>::
+       Use the partial clone feature and request that the server sends
+       a subset of reachable objects according to a given object filter.
+       When using `--filter`, the supplied _<filter-spec>_ is used for
+       the partial fetch. For example, `--filter=blob:none` will filter
+       out all blobs (file contents) until needed by Git. Also,
+       `--filter=blob:limit=<size>` will filter out all blobs of size
+       at least _<size>_. For more details on filter specifications, see
+       the `--filter` option in linkgit:git-rev-list[1].
+
 ifndef::git-pull[]
 `--write-fetch-head`::
 `--no-write-fetch-head`::