$ git clone -n https://src.fedoraproject.org/rpms/R-qpdf.git /var/lib/mock/f41-build-side-1-3141664-39987/root/chroot_tmpdir/scmroot/R-qpdf
Cloning into '/var/lib/mock/f41-build-side-1-3141664-39987/root/chroot_tmpdir/scmroot/R-qpdf'...
$ git fetch origin dd26d2d7f1e6d9ff39990e7843eecfc1e70e00ca:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-qpdf
 * [new ref]         dd26d2d7f1e6d9ff39990e7843eecfc1e70e00ca -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dd26d2d convert ASL 2.0 license to SPDX