$ git clone -n https://src.fedoraproject.org/rpms/PackageKit-Qt.git /var/lib/mock/f45-build-1152-297/root/chroot_tmpdir/scmroot/PackageKit-Qt
Cloning into '/var/lib/mock/f45-build-1152-297/root/chroot_tmpdir/scmroot/PackageKit-Qt'...
$ git fetch origin cf7e5e35de553b375de8fef11bfae62d00ba8888:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/PackageKit-Qt
 * [new ref]         cf7e5e35de553b375de8fef11bfae62d00ba8888 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cf7e5e3 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild