$ git clone -n https://src.fedoraproject.org/rpms/zathura-djvu.git /var/lib/mock/f40-build-1138369-20833/root/chroot_tmpdir/scmroot/zathura-djvu
Cloning into '/var/lib/mock/f40-build-1138369-20833/root/chroot_tmpdir/scmroot/zathura-djvu'...
$ git fetch origin c9bd3864b337c816eab54b7120666eed2ce77fba:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/zathura-djvu
 * [new ref]         c9bd3864b337c816eab54b7120666eed2ce77fba -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c9bd386 Rebuild against zathura 0.5.6