$ git clone -n https://src.fedoraproject.org/rpms/zathura-pdf-mupdf.git /var/lib/mock/f42-build-864534-172408/root/chroot_tmpdir/scmroot/zathura-pdf-mupdf
Cloning into '/var/lib/mock/f42-build-864534-172408/root/chroot_tmpdir/scmroot/zathura-pdf-mupdf'...
$ git fetch origin 162c06e250973caaeccfd1374939073aea789470:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/zathura-pdf-mupdf
 * [new ref]         162c06e250973caaeccfd1374939073aea789470 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 162c06e Update to 0.4.4 (rhbz#2302704)