$ git clone -n https://src.fedoraproject.org/rpms/zathura.git /var/lib/mock/f40-build-1512615-23909/root/chroot_tmpdir/scmroot/zathura
Cloning into '/var/lib/mock/f40-build-1512615-23909/root/chroot_tmpdir/scmroot/zathura'...
$ git fetch origin 04b532a5e7472b23c20ae9ce21a5eefe1bfd5461:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/zathura
 * [new ref]         04b532a5e7472b23c20ae9ce21a5eefe1bfd5461 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 04b532a Fix build on i686