Fix error in fetch when testing reference
Fix error in fetch when testing reference

Fetch to checked out branch fails. Use '--update-head-ok' to address
the problem.

Change-Id: I495ec82ff0629798443a5dfe946624dc7b752064
Reviewed-by: Rohan McGovern <d75463945f40a9669160a73cef2843e56b22c602@nokia.com>

tsarajar/qtqa,tsarajar/qtqa,tsarajar/qtqa,tsarajar/qtqa