This is why MacPorts sucks...

port -y install git

port -y install git-core
--->  Computing dependencies for git-core
--->  Dependencies to be installed: curl curl-ca-bundle perl5 perl5.8 libidn gettext expat libiconv gperf ncurses ncursesw openssl zlib pkgconfig p5-error python26 bzip2 db46 gdbm readline sqlite3 rsync popt
For perl5.8: skipping org.macports.main (dry run)
For perl5: skipping org.macports.main (dry run)
For curl-ca-bundle: skipping org.macports.main (dry run)
For expat: skipping org.macports.main (dry run)
For gperf: skipping org.macports.main (dry run)
For libiconv: skipping org.macports.main (dry run)
For ncursesw: skipping org.macports.main (dry run)
For ncurses: skipping org.macports.main (dry run)
For gettext: skipping org.macports.main (dry run)
For libidn: skipping org.macports.main (dry run)
For zlib: skipping org.macports.main (dry run)
For openssl: skipping org.macports.main (dry run)
For pkgconfig: skipping org.macports.main (dry run)
For curl: skipping org.macports.main (dry run)
For p5-error: skipping org.macports.main (dry run)
For bzip2: skipping org.macports.main (dry run)
For db46: skipping org.macports.main (dry run)
For gdbm: skipping org.macports.main (dry run)
For readline: skipping org.macports.main (dry run)
For sqlite3: skipping org.macports.main (dry run)
For python26: skipping org.macports.main (dry run)
For popt: skipping org.macports.main (dry run)
For rsync: skipping org.macports.main (dry run)
For git-core: skipping org.macports.main (dry run)

For anyone else that finds this page - you have to drop the -y.