Git version not mentioned

Needed (minimum) Git version and possible problems with it does not mention in system requirements page doc/install/requirements.md

Minimum git version is mentioned in the install docs: https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/install/installation.md#1-packages-dependencies

Status changed to closed

mentioned in commit 68b32f3b

Mentioned in commit 68b32f3b

mentioned in merge request !14785