To take out a giraffe I'd patiently duck and weave and evade the beast by keeping out of striking range by a comfortable couple of miles.
I'd then bide my time, build a house in the village, take a wife, hold down a job and let the giraffe develop a false sense of confidence until after 25 years just when his life expectancy is up and the final few grains are falling in his hourglass, that's when I'll strike and kick him in the shins as it all goes dark and i tell him he was dead all along, he just never knew it.
A few selfies with me putting him in a headlock and then I can leave the wife, quit the job, burn down my hut and return to my country for my next mission.