$ git clone -n https://src.fedoraproject.org/rpms/cpphs.git /var/lib/mock/f45-build-5518-340/root/chroot_tmpdir/scmroot/cpphs
Cloning into '/var/lib/mock/f45-build-5518-340/root/chroot_tmpdir/scmroot/cpphs'...
$ git fetch origin a6a0f24edd4efe926f527cef50e6d909e8ae05ef:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cpphs
 * [new ref]         a6a0f24edd4efe926f527cef50e6d909e8ae05ef -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a6a0f24 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild