$ git clone -n https://src.fedoraproject.org/rpms/powerdevil.git /var/lib/mock/f41-build-858197-168325/root/chroot_tmpdir/scmroot/powerdevil
Cloning into '/var/lib/mock/f41-build-858197-168325/root/chroot_tmpdir/scmroot/powerdevil'...
$ git fetch origin ba90c072f46bc9bce52d7974676d3f37f644170b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/powerdevil
 * [new ref]         ba90c072f46bc9bce52d7974676d3f37f644170b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ba90c07 6.2.1