$ git clone -n https://src.fedoraproject.org/rpms/zinnia.git /var/lib/mock/f41-build-814649-149007/root/chroot_tmpdir/scmroot/zinnia
Cloning into '/var/lib/mock/f41-build-814649-149007/root/chroot_tmpdir/scmroot/zinnia'...
$ git fetch origin c8bccd87247206e14aec77855c0f49601bd0cd5c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/zinnia
 * [new ref]         c8bccd87247206e14aec77855c0f49601bd0cd5c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c8bccd8 Perl 5.40 rebuild