$ git clone -n https://src.fedoraproject.org/rpms/libvirt.git /var/lib/mock/f31-build-95755-32729/root/thebuilddir/tmp/scmroot/libvirt
Cloning into '/var/lib/mock/f31-build-95755-32729/root/thebuilddir/tmp/scmroot/libvirt'...
$ git reset --hard 7d77bf76aa6f195c36da9482223928c6ea5a639e
HEAD is now at 7d77bf7 libvirt-5.6.0-1.fc31