$ git clone -n https://src.fedoraproject.org/rpms/pepc.git /var/lib/mock/f39-build-1626468-39286/root/chroot_tmpdir/scmroot/pepc
Cloning into '/var/lib/mock/f39-build-1626468-39286/root/chroot_tmpdir/scmroot/pepc'...
$ git fetch origin 7079c2ed02feb4bf78dc818757eeb6fc7d147cc5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/pepc
 * [new ref]         7079c2ed02feb4bf78dc818757eeb6fc7d147cc5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7079c2e update to 1.4.32