Description of problem: Trying to clone a Git repository over SSH, I get: This transport isn't implemented. Sorry This is because libgit2 wasn't built against libssh2 (it's an optional dependency). Please rebuild libgit2 against libssh2 (simply adding the BuildRequires dis all it takes), as this is a very common transport.
This is fixed in Rawhide: http://koji.fedoraproject.org/koji/buildinfo?buildID=507207