$ git clone -n https://src.fedoraproject.org/rpms/python-sphinxcontrib-serializinghtml.git /var/lib/mock/f45-build-33116-667/root/chroot_tmpdir/scmroot/python-sphinxcontrib-serializinghtml
Cloning into '/var/lib/mock/f45-build-33116-667/root/chroot_tmpdir/scmroot/python-sphinxcontrib-serializinghtml'...
$ git fetch origin 764d96a7b31e22d55f898d353df84d9fa87756eb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-sphinxcontrib-serializinghtml
 * [new ref]         764d96a7b31e22d55f898d353df84d9fa87756eb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 764d96a Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild