article.gmane.org/gmane.linux.kernel/1853266
git-blame.blogspot.com/2014/12/git-1856-195-205-214-and-221-and.html
mercurial.selenic.com/wiki/WhatsNew
securitytracker.com/id?1031404
support.apple.com/kb/HT204147
github.com/blog/1938-git-client-vulnerability-announced
github.com/libgit2/libgit2/commit/928429c5c96a701bcbcafacb2421a82602b36915
libgit2.org/security/
news.ycombinator.com/item?id=8769667