$ git clone -n https://src.fedoraproject.org/rpms/radvd.git /var/lib/mock/f45-build-34277-683/root/chroot_tmpdir/scmroot/radvd
Cloning into '/var/lib/mock/f45-build-34277-683/root/chroot_tmpdir/scmroot/radvd'...
$ git fetch origin da4534a1b5045963f80b6a479311bd575c2362bb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/radvd
 * [new ref]         da4534a1b5045963f80b6a479311bd575c2362bb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at da4534a Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild