$ git clone -n https://src.fedoraproject.org/rpms/xfce4-power-manager.git /var/lib/mock/f39-build-2012400-45774/root/chroot_tmpdir/scmroot/xfce4-power-manager
Cloning into '/var/lib/mock/f39-build-2012400-45774/root/chroot_tmpdir/scmroot/xfce4-power-manager'...
$ git fetch origin fc93a61e0cb86998da54d82e6bc5a60c44622209:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xfce4-power-manager
 * [new ref]         fc93a61e0cb86998da54d82e6bc5a60c44622209 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fc93a61 Update to 4.18.3 release