$ git clone -n https://src.fedoraproject.org/rpms/sidplayfp.git /var/lib/mock/f45-build-35929-700/root/chroot_tmpdir/scmroot/sidplayfp
Cloning into '/var/lib/mock/f45-build-35929-700/root/chroot_tmpdir/scmroot/sidplayfp'...
$ git fetch origin 7159a30464c5e12cd7febed40df1b90bea22b754:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/sidplayfp
 * [new ref]         7159a30464c5e12cd7febed40df1b90bea22b754 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7159a30 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild