$ git clone -n https://github.com/xcp-ng-rpms/protobuf.git /var/lib/mock/v8.1-base-1956-1338/root/chroot_tmpdir/scmroot/protobuf
Cloning into '/var/lib/mock/v8.1-base-1956-1338/root/chroot_tmpdir/scmroot/protobuf'...
$ git reset --hard 10981eb5984982acf40d9c547f6296cc3d36806f
Downloading SOURCES/googletest-1.8.1.tar.gz (992 KB)
Downloading SOURCES/protobuf-3.6.1-all.tar.gz (4.5 MB)
HEAD is now at 10981eb Rebuild for XCP-ng 8.1 and add provenance comment