$ git clone -n https://src.fedoraproject.org/rpms/mongo-cxx-driver.git /var/lib/mock/f31-build-56277-28209/root/chroot_tmpdir/scmroot/mongo-cxx-driver
Cloning into '/var/lib/mock/f31-build-56277-28209/root/chroot_tmpdir/scmroot/mongo-cxx-driver'...
$ git reset --hard 524f40eff811ecf55cc7181bb4db79d7c3b25315
HEAD is now at 524f40e Disable testing, as it requires MongoDB