$ git clone -n https://src.fedoraproject.org/rpms/freeradius.git /var/lib/mock/f39-build-1563064-37471/root/chroot_tmpdir/scmroot/freeradius
Cloning into '/var/lib/mock/f39-build-1563064-37471/root/chroot_tmpdir/scmroot/freeradius'...
$ git fetch origin 6522d88fb17e10140fb063743e0b7862cda835f5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/freeradius
 * [new ref]         6522d88fb17e10140fb063743e0b7862cda835f5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6522d88 Update to 3.2.3 upstream release