git-howto.texi: fix a typo

replace 'Refer to and to sync...' with a reference to the section that
discusses updated the source tree.
Reviewed-by: Timothy Gu <timothygu99@gmail.com>
Reviewed-by: Michael Niedermayer <michaelni@gmx.at>
Signed-off-by: James Zern <jzern@google.com>

doc/git-howto.texi

@@ -75,6 +75,7 @@ git config --global core.autocrlf false
 @end example
 
 
+@anchor{Updating the source tree to the latest revision}
 @section Updating the source tree to the latest revision
 
 @example
@@ -330,7 +331,7 @@ git push
 
 Will push the changes to the default remote (@var{origin}).
 Git will prevent you from pushing changes if the local and remote trees are
-out of sync. Refer to and to sync the local tree.
+out of sync. Refer to @ref{Updating the source tree to the latest revision}.
 
 @example
 git remote add <name> <url>