$ git clone -n https://src.fedoraproject.org/rpms/libjson-rpc-cpp.git /var/lib/mock/f31-build-69298-30303/root/chroot_tmpdir/scmroot/libjson-rpc-cpp
Cloning into '/var/lib/mock/f31-build-69298-30303/root/chroot_tmpdir/scmroot/libjson-rpc-cpp'...
$ git reset --hard b2a54a92e2ca508b22fe27b96010c517051b3b1f
HEAD is now at b2a54a9 - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild