The download will start from Source Forge . In the command line, type:
# Using wget
wget get.typo3.org/current -O typo3_src.tgz
# Using curl
curl -L -o typo3_src.tgz get.typo3.org/current
get.typo3.org/current : current stable core
get.typo3.org/dev : upcoming core
get.typo3.org/6.2 : latest version of the 6.2 branch
get.typo3.org/6.2.1 : specific version 6.2.1
get.typo3.org/dummy-4.5 : latest dummy package of branch 4-5