$ git clone -n https://src.fedoraproject.org/rpms/radicale.git /var/lib/mock/f41-build-side-1-3135920-39768/root/chroot_tmpdir/scmroot/radicale
Cloning into '/var/lib/mock/f41-build-side-1-3135920-39768/root/chroot_tmpdir/scmroot/radicale'...
$ git fetch origin 642c0fca9a491e51b687ef922e780454a383823c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/radicale
 * [new ref]         642c0fca9a491e51b687ef922e780454a383823c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 642c0fc fix changelog