$ git clone -n https://src.fedoraproject.org/rpms/zathura-pdf-poppler.git /var/lib/mock/f42-build-864535-172408/root/chroot_tmpdir/scmroot/zathura-pdf-poppler
Cloning into '/var/lib/mock/f42-build-864535-172408/root/chroot_tmpdir/scmroot/zathura-pdf-poppler'...
$ git fetch origin 568236930e1d4c8266ecbf39bbe3df8c3eb39631:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/zathura-pdf-poppler
 * [new ref]         568236930e1d4c8266ecbf39bbe3df8c3eb39631 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5682369 Update to 0.3.3