Documentation: Define symref and update HEAD description

diff --git a/Documentation/git-svn.txt b/Documentation/git-svn.txt
index 450ff1f85b5f6ed0cca552bebb0ca1a279788ae5..a764d1f8ee52742b85ce8edff22814a32be82dfb 100644 (file)
--- a/Documentation/git-svn.txt
+++ b/Documentation/git-svn.txt
@@ -120,6 +120,7 @@ manually joining branches on commit.
        URL of the target Subversion repository.  The final argument
        (URL) may be omitted if you are working from a git-svn-aware
        repository (that has been init-ed with git-svn).
+       The -r<revision> option is required for this.
 
 'graft-branches'::
        This command attempts to detect merges/branches from already