$ git clone -n https://github.com/xcp-ng-rpms/protobuf.git /var/lib/mock/v8.3-base-4139-4013/root/chroot_tmpdir/scmroot/protobuf
Cloning into '/var/lib/mock/v8.3-base-4139-4013/root/chroot_tmpdir/scmroot/protobuf'...
$ git reset --hard 1b268f19d0560e2c95dee8c5c9527a57d3941665
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 1b268f1 Rebuild for XCP-ng 8.3 alpha