The source code is managed by git

On Freedesktop.org

Anonymous git

• Check out the tree: git clone git://anongit.freedesktop.org/git/libopenraw.git

For developers (needs authorization)

• Get a username if you don't have one: See http://www.freedesktop.org/wiki/AccountRequests for details.
• Check out the tree: git clone git+ssh://git.freedesktop.org/git/libopenraw.git

Github

There is a full mirror on github at https://github.com/hfiguiere/libopenraw

If you feel more comfortable, feel free to do pull request there.