Move git operations for UpdateRemoteMirrorService into Gitlab::Git
Move git operations for UpdateRemoteMirrorService into Gitlab::Git

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