$ git clone -n https://src.fedoraproject.org/rpms/rubygem-nokogiri.git /var/lib/mock/f31-build-52651-27709/root/chroot_tmpdir/scmroot/rubygem-nokogiri
Cloning into '/var/lib/mock/f31-build-52651-27709/root/chroot_tmpdir/scmroot/rubygem-nokogiri'...
$ git reset --hard c503ec12a2fe6fd79138667ff7815ac585276f61
HEAD is now at c503ec1 add missing source