$ git clone -n https://src.fedoraproject.org/rpms/rubygem-json.git /var/lib/mock/f33-build-283326-51874/root/chroot_tmpdir/scmroot/rubygem-json
Cloning into '/var/lib/mock/f33-build-283326-51874/root/chroot_tmpdir/scmroot/rubygem-json'...
$ git reset --hard 4cb5ad8646288f6f3d70be899fdca821a5a86387
HEAD is now at 4cb5ad8 2.3.1