skip the branch fetch if we already have the sha
skip the branch fetch if we already have the sha

jirutka/gitlabhq,mmkassem/gitlabhq,iiet/iiet-git,stoplightio/gitlabhq,mmkassem/gitlabhq,jirutka/gitlabhq,dreampet/gitlab,stoplightio/gitlabhq,dreampet/gitlab,axilleas/gitlabhq,iiet/iiet-git,axilleas/gitlabhq,stoplightio/gitlabhq,iiet/iiet-git,mmkassem/gitlabhq,axilleas/gitlabhq,jirutka/gitlabhq,jirutka/gitlabhq,mmkassem/gitlabhq,dreampet/gitlab,axilleas/gitlabhq,dreampet/gitlab,iiet/iiet-git,stoplightio/gitlabhq