Git: Fix updating branch view on push to new remote branch

If the remote branch does not exist yet,
we need to update the whole branch model,
in order to set the remote-tracking information
and to add the new branch to the remote branches.

Amends da6972e0a9

Change-Id: I9f01ceffa45fcb5e2ea8afe8762b102a550b8e43
Reviewed-by: Marius Sincovici <smaryus@gmail.com>
Reviewed-by: Orgad Shaneh <orgads@gmail.com>

src/plugins/git/gitclient.cpp

@@ -3200,8 +3200,9 @@ void GitClient::push(const QString &workingDirectory, const QStringList &pushArg
                     VcsCommand *rePushCommand = vcsExec(workingDirectory,
                                                         fallbackCommandParts.mid(1),
                             nullptr, true, VcsCommand::ShowSuccessMessage);
-                    connect(rePushCommand, &VcsCommand::success,
-                            this, []() { GitPlugin::instance()->updateCurrentBranch(); });
+                    connect(rePushCommand, &VcsCommand::success, this, [workingDirectory]() {
+                        GitPlugin::instance()->updateBranches(workingDirectory);
+                    });
                 }
                 break;
             }