I’ve found that some subcommands such as git-clone, git-fetch, and git-pull support an option named ‘--shallow-since’, as of Git version 2.11. This option is documented in the man page of each subcommand. In Git 2.14.1, I’ve checked that the option is available for git-clone and git-fetch so that the history of a shallow repository is updated. However, running git-pull with this option shows an error as follows: error: unknown option `shallow-since=2017-09-10T00:00:00+00:00' usage: git pull [<options>] [<repository> [<refspec>...]] ... I found that this option is not available in Git 2.14.1 on macOS and Ubuntu 16.04.1. It seems the option handling of git-pull does not match with what’s described in the man page. Since ‘git pull’ is a shorthand for ‘git fetch’ followed by ‘git merge FETCH_HEAD’ in its default mode, we can run these two commands in this order as a workaround.
