$ git clone -n https://src.fedoraproject.org/rpms/python-sphinxygen.git /var/lib/mock/f45-build-33147-667/root/chroot_tmpdir/scmroot/python-sphinxygen
Cloning into '/var/lib/mock/f45-build-33147-667/root/chroot_tmpdir/scmroot/python-sphinxygen'...
$ git fetch origin 5af2af88fa264ac6cb2ba935f72bf4ca362a2d4b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-sphinxygen
 * [new ref]         5af2af88fa264ac6cb2ba935f72bf4ca362a2d4b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5af2af8 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild