How can I scan all files in a directory with a specific file extension?

I recently changed my Fortify scan command from sourceanalyzer -b 11809 "./**/*.go" to sourceanalyzer -b 11809 "./wmd/**/*.go". The intent was to only scan Go files in the wmd directory of my project.

However, after making this change, I noticed that the Fortify findings for a wmd/pack.go file are gone in the Fortify UI.

My guess is that this file was not included because I have /**/ after wmd, which might only match Go files in subdirectories of wmd, and not get any files that are directly in wmd.

What pattern should I provide to sourceanlyzer so that it will scan Go files in wmd and all subdirectories?