$ git clone -n https://src.fedoraproject.org/rpms/perl-Dist-Zilla-Plugin-Git.git /var/lib/mock/f41-build-1153662-21307/root/chroot_tmpdir/scmroot/perl-Dist-Zilla-Plugin-Git
Cloning into '/var/lib/mock/f41-build-1153662-21307/root/chroot_tmpdir/scmroot/perl-Dist-Zilla-Plugin-Git'...
$ git fetch origin 13b64751fa619b61e966fce6713830b1cec45d1d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Dist-Zilla-Plugin-Git
 * [new ref]         13b64751fa619b61e966fce6713830b1cec45d1d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 13b6475 2.051 bump