fdupes-1.51-3 has three packaging problems, it would be great if you could rebuild and push an updated -4 pkgrel.

1) source tarball referencing git HEAD

It looks the package is pulling directly from the git HEAD via https://github.com/adrianlopezroche/fdupes/archive/master.zip. I assume you used that for testing and accidentally commited it, it would be great to switch this to a versioned release tarball (like before) or pin it to a static commit hash if there is no release but you need (for whatever reason) a newer version. Pulling master tarball may always return different versions and rebuilding a package is not deterministic anymore.
Upstream seems to provide the version you package via: https://github.com/adrianlopezroche/fdupes/archive/fdupes-1.51.tar.gz
If you need some fixes that came after that I always either backport separate patch commits and apply them to the release version or try to convince upstream to create a new release tag.

2) chroot

the .BUILDINFO file contains a reference to /home/tmp/xyne/usr/etc/tu/svn-packages/fdupes/trunk
I assume you accidentally forgot to build this package in a chroot. We need packages to be always built in a chroot so the .BUILDINFO file can be used to properly recreate build environments for reproducible builds.

3) packager

Currently the packager option contains the value "Unknown Packager", this should also be corrected. I assume this also happened because you accidentally did not built in your regular chroot setup via extra-x86_64-build/extra-i686-build that automatically provides a makepkg.conf from your host system with your packager name.

cheers,
Levente