Git: Update current branch after some operations

... to refresh the branch view upstream status.

No need for a full model update here, only the current
branch is influenced.

Change-Id: I6bd17a841988b36221e5015a5858071d33a7b5e5
Reviewed-by: Orgad Shaneh <orgads@gmail.com>

src/plugins/git/branchview.h

@@ -57,6 +57,7 @@ public:
 
     void refreshIfSame(const QString &repository);
     void refresh(const QString &repository, bool force);
+    void refreshCurrentBranch();
 
     QToolButton *addButton() const;
     QToolButton *refreshButton() const;