This is incoming.ports.debian.org, a staging area (also known as queue/accepted) for packages recently uploaded to Debian Ports.
Packages enter this directory when they are uploaded either by the maintainer or buildd administrators.
Packages leave this directory when an archive run happens, at 06:02, 12:02 18:02 and 00:02 UTC.
WARNING: Care is required when using packages from this site; it is normally better to wait until they reach the normal mirror network.