Setting tags in SRCREV has never been a good idea and fail now with something lie
| ERROR: pinball-table-gnu-0.0.20200601-r0 do_fetch: Bitbake Fetcher Error: FetchError("Recipe uses a floating tag/branch without a fixed SRCREV yet doesn't call bb.fetch2.get_srcrev() (use SRCPV in PV for OE).", None)
Signed-off-by: Andreas Müller <schnitzeltony@gmail.com>