$ git clone -n https://src.fedoraproject.org/rpms/applet-window-buttons.git /var/lib/mock/f40-build-799427-142276/root/chroot_tmpdir/scmroot/applet-window-buttons
Cloning into '/var/lib/mock/f40-build-799427-142276/root/chroot_tmpdir/scmroot/applet-window-buttons'...
$ git fetch origin 2fba2fb7d3dc04e2843ee47ac1ea65afb4623c71:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/applet-window-buttons
 * [new ref]         2fba2fb7d3dc04e2843ee47ac1ea65afb4623c71 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2fba2fb Switch to a fork compatible with Plasma 6