$ git clone -n https://src.fedoraproject.org/rpms/libfastjson.git /var/lib/mock/f31-build-58558-28468/root/chroot_tmpdir/scmroot/libfastjson
Cloning into '/var/lib/mock/f31-build-58558-28468/root/chroot_tmpdir/scmroot/libfastjson'...
$ git reset --hard de58e0a9cc92ba4b5c69703b139983228bfb50c1
HEAD is now at de58e0a - Rebuilt for https://fedoraproject.org/wiki/Fedora_30_Mass_Rebuild