$ git clone -n https://src.fedoraproject.org/rpms/R-qpdf.git /var/lib/mock/f41-build-1111503-20153/root/chroot_tmpdir/scmroot/R-qpdf
Cloning into '/var/lib/mock/f41-build-1111503-20153/root/chroot_tmpdir/scmroot/R-qpdf'...
$ git fetch origin ead43c92efb6613afcc3e876bcbf659806868ab9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-qpdf
 * [new ref]         ead43c92efb6613afcc3e876bcbf659806868ab9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ead43c9 Eliminate use of obsolete %patchN syntax (#2283636)