$ git clone -n https://src.fedoraproject.org/rpms/rkhunter.git /var/lib/mock/f45-build-34573-688/root/chroot_tmpdir/scmroot/rkhunter
Cloning into '/var/lib/mock/f45-build-34573-688/root/chroot_tmpdir/scmroot/rkhunter'...
$ git fetch origin a017b6badbb9f15b494c6d3ff86b266dde25aed5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rkhunter
 * [new ref]         a017b6badbb9f15b494c6d3ff86b266dde25aed5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a017b6b Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild