I have tested this and it appears to fix the leak of gpg-agent processes in virt-builder, thanks.

Confirmed that it now compiles ok on Fedora, thanks.

For anyone following this bug, someone has worked out a (very awkward) workaround: https://stackoverflow.com/a/27689596/2505159

I'm still hitting this on Fedora. The patch is simple and was posted on the mailing list but apparently not incorporated into git: