/usr/share/doc/libglobus-gass-copy-dev/changelog.Debian.gz is in libglobus-gass-copy-dev 8.6-3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libglobus-gass-copy-dev/../libglobus-gass-copy2/changelog.Debian.gz