$ git clone -n https://src.fedoraproject.org/rpms/qpdf.git /var/lib/mock/f45-build-33930-675/root/chroot_tmpdir/scmroot/qpdf
Cloning into '/var/lib/mock/f45-build-33930-675/root/chroot_tmpdir/scmroot/qpdf'...
$ git fetch origin a82ff8cfa72be4cbc12a5400b2e3d2cc5d40e37c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qpdf
 * [new ref]         a82ff8cfa72be4cbc12a5400b2e3d2cc5d40e37c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a82ff8c 12.4.0 (fedora#2512995)