Comment # 3 on bug 1185613 from Ludwig Nussel

Yes and no. You can't do this during build time:

$ osc rbl openSUSE:Factory groff standard x86_64|grep -B2 -A4 "++ PRETTY_NA"
[   64s] + . /etc/os-release
[   64s] ++ NAME='openSUSE Dummy'
[   64s] ++ PRETTY_NAME='openSUSE Dummy'
[   64s] ++ ID=suse
[   64s] ++ ID_LIKE=suse
[   64s] ++ VERSION_ID=Dummy
[   64s] + sed -i 's:\(doc-volume-operating-system\) BSD:\1 openSUSE Dummy:'
tmac/doc-common-u