[CE] Move git operations for UpdateRemoteMirrorService into Gitlab::Git (!16023) · Merge requests · GitLab.org / GitLab FOSS · GitLab

Alejandro Rodríguez requested to merge ce-gitaly-remote-mirror-prep into master Dec 19, 2017

CE backport of relevant changes from https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/3824/commits