gitlab-ci: use the launcher for git commands
This ensures that the new Git from the SCL is used instead of the ancient one that CentOS ships by default.
System updates will be applied on Nov 25th between 7am and 9am, EST (UTC-05:00). This site will have intermittent downtime during that time.
This ensures that the new Git from the SCL is used instead of the ancient one that CentOS ships by default.