$ git clone -n https://src.fedoraproject.org/rpms/libwnck3.git /var/lib/mock/f31-build-71895-30800/root/chroot_tmpdir/scmroot/libwnck3
Cloning into '/var/lib/mock/f31-build-71895-30800/root/chroot_tmpdir/scmroot/libwnck3'...
$ git reset --hard d5b47f520ccdfd5c679183a25df1ea7cd5eefd7d
HEAD is now at d5b47f5 - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild