$ git clone -n https://src.fedoraproject.org/rpms/python-opytimizer.git /var/lib/mock/f42-build-side-1-3589273-46955/root/chroot_tmpdir/scmroot/python-opytimizer
Cloning into '/var/lib/mock/f42-build-side-1-3589273-46955/root/chroot_tmpdir/scmroot/python-opytimizer'...
$ git fetch origin d12798091c6298729f40341fb7b1ce33c633d80f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-opytimizer
 * [new ref]         d12798091c6298729f40341fb7b1ce33c633d80f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d127980 Do not build the docs