$ git clone -n https://src.fedoraproject.org/rpms/pepc.git /var/lib/mock/f45-build-21539-586/root/chroot_tmpdir/scmroot/pepc
Cloning into '/var/lib/mock/f45-build-21539-586/root/chroot_tmpdir/scmroot/pepc'...
$ git fetch origin 262fcc6ca642e6a5ae0091d3a9f2a3b6fb872e75:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/pepc
 * [new ref]         262fcc6ca642e6a5ae0091d3a9f2a3b6fb872e75 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 262fcc6 pyproject fixes