$ git clone -n https://src.fedoraproject.org/rpms/powerdevil.git /var/lib/mock/f42-build-862550-170850/root/chroot_tmpdir/scmroot/powerdevil
Cloning into '/var/lib/mock/f42-build-862550-170850/root/chroot_tmpdir/scmroot/powerdevil'...
$ git fetch origin c6935fb7f904b628854c9674c0f4277ff5826841:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/powerdevil
 * [new ref]         c6935fb7f904b628854c9674c0f4277ff5826841 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c6935fb 6.2.4