$ git clone -n https://src.fedoraproject.org/rpms/rubygem-json.git /var/lib/mock/f31-build-52254-27642/root/chroot_tmpdir/scmroot/rubygem-json
Cloning into '/var/lib/mock/f31-build-52254-27642/root/chroot_tmpdir/scmroot/rubygem-json'...
$ git reset --hard caa055abe50fcfc1e10a7fa6c8a009d1fd75649c
HEAD is now at caa055a Update to 2.2.0 Bump release