These electric metal shears are well worth the price in hand cramps saved if you're making more than a few cuts.
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The advantage of these over the ones with the more ergonomic handle is that they don't take a kerf out so that you won't be seeding your lawn with tiny bits of metal that the chickens will pick up and swallow.
Mow a work area down as tight to the ground as you feel comfortable with your lawn, rake it well, and enlist a couple extra people to stand on the wire as you work. If no people are available, use bricks, boards, logs, etc. as weights.
Laying it out with the curve up and walking on it helps.