$ git clone -n https://src.fedoraproject.org/rpms/rubygem-json.git /var/lib/mock/f37-build-680493-76992/root/chroot_tmpdir/scmroot/rubygem-json
Cloning into '/var/lib/mock/f37-build-680493-76992/root/chroot_tmpdir/scmroot/rubygem-json'...
$ git reset --hard 3443b995369069dee9bef824fa7125dcd4fcc7a7
HEAD is now at 3443b99 2.6.3