Fix parsing remoteUrl when on a branch

Fixes bug in extension version 3 (unreleased). The problem was that when the branch wasn't tracking remote branch, the extension failed to parse remote URL and couldn't fetch issues.

Details are in the issue itself #193 (closed)

Screenshots

(notice the branch, the issue is not happening on master because master usually tracks origin/master)

Before	After

Closes #193 (closed)