I've looked at packaging skopeo as well, and according to the dh-make-golang tool, there are apparently 3 dependencies blocking this ITP:
2019/01/09 06:54:27 Build-Dependency "
github.com/containers/image" is not yet available in Debian, or has not yet been converted to use XS-Go-Import-Path in debian/control
The latter one is #900900, the first two don't seem to be worked on yet.