$ git clone -n https://src.fedoraproject.org/rpms/R-plyr.git /var/lib/mock/f45-build-6306-347/root/chroot_tmpdir/scmroot/R-plyr
Cloning into '/var/lib/mock/f45-build-6306-347/root/chroot_tmpdir/scmroot/R-plyr'...
$ git fetch origin eaf22db95eac2053126de2c5a942199470d31e9f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-plyr
 * [new ref]         eaf22db95eac2053126de2c5a942199470d31e9f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at eaf22db Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild