Package git-subtree

https://git-scm.com/

Git subtrees allow subprojects to be included within a subdirectory
of the main project, optionally including the subproject's entire
history.

See also: git, git-annex, git-cal, git-cola, git-core-doc, git-cpan-patch, git-crypt, git-cvs, git-daemon, git-email, git-extras, git-fame, git-filter-repo, git-ftp, git-gui, git-instaweb, git-lab-porcelain, git-lfs, git-merge-changelog, git-octopus, git-publish, git-remote-gcrypt, git-remote-hg, git-review, git-secret, git-secrets, git-subrepo, git-svn, git-tools, git-xcleaner.