[PATCH] Document git-svn fetch --log-window-size parameter

["Gunnlaugur Þór Briem" <gunnlaugur@gmail.com>]

The --log-window-size parameter to git-svn fetch is undocumented.

Minimally describe what it does and why the user might change it.

Signed-off-by: Gunnlaugur Þór Briem <gunnlaugur@gmail.com>
---
 Documentation/git-svn.txt | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Documentation/git-svn.txt b/Documentation/git-svn.txt
index cfe8d2b..64756c9 100644
--- a/Documentation/git-svn.txt
+++ b/Documentation/git-svn.txt
@@ -146,6 +146,12 @@ Skip "branches" and "tags" of first level directories;;
 ------------------------------------------------------------------------
 --
 
+--log-window-size=<n>;;
+    Fetch <n> log entries per request when scanning Subversion history.
+    The default is 100. For very large Subversion repositories, larger
+    values may be needed for 'clone'/'fetch' to complete in reasonable
+    time. But overly large values may lead to request timeouts.
+
 'clone'::
 	Runs 'init' and 'fetch'.  It will automatically create a
 	directory based on the basename of the URL passed to it;
-- 
1.7.12.3