$ git clone -n https://src.fedoraproject.org/rpms/powerdevil.git /var/lib/mock/f42-bootstrap-3533986-46428/root/chroot_tmpdir/scmroot/powerdevil
Cloning into '/var/lib/mock/f42-bootstrap-3533986-46428/root/chroot_tmpdir/scmroot/powerdevil'...
$ git fetch origin 05fcc2e22c11161bd0948a7ee69d43a539048b61:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/powerdevil
 * [new ref]         05fcc2e22c11161bd0948a7ee69d43a539048b61 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 05fcc2e 6.3.5