RE:gbp import-orig --uscan: tar -t -a -f returns exit status 2

maybe this : https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=831870

RE:gbp import-orig --uscan: tar -t -a -f returns exit status 2

Maybe a hint. tar.gz generated via github, seems to cause troubles during the import process. just try to extract the tar.gz via tar and regenerate it from the extracted files. Maybe it should solve your problem.