Could possibly be from an older slang sense of kamma meaning ’to get, to earn’, from Tavringer Romani kamma (“to have, to own”), compare kamma noll (“to get nothing”), from Romani kam- (“to wish, to request”). Related to Sanskrit कामयति (kāmayati, “to wish, to desire”), from *keh₂- (“to desire, wish”).

• IPA^(key): /kama ˈhɛm/

kamma hem (present kammar hem, preterite kammade hem, supine kammat hem, imperative kamma hem)

1. (idiomatic, transitive, colloquial) to win, to procure (as a prize)

   kamma hem segern

   take the victory

   kamma hem priset

   win the prize

   • 2019, My Östh Gustafsson, Sydsvenskan‎^[1]:

     Egyptiska filmen ’EXT. Night’ av Ahmad Abdalla El Sayed kammade hem priset för bästa långfilm.

     The Egyptian film ’EXT. Night’ by Ahmad Abdalla El Sayed won the prize for best feature film.

• kamma hem in Svensk ordbok (SO)
• kamma in Svenska Akademiens ordlista (SAOL)
• Gerd Carling (2005) “kamma”, in Romani i svenskan: Storstadsslang och standardspråk, Stockholm: Carlsson, →ISBN, page 85