If it is a small hole, I sometimes wrap the hose with the silicone repair tape that stretches and sticks to itself.
If it is a split, pitchfork gash, tomato cage puncture, dog bite, weedeater whack, (how do these things happen anyway?)
I cut out the bad part and use an irrigation tube compression fitting to splice the ends together. They come in 1/2 in. diameter (green ends) and 5/8 in. diameter (black ends). You can also use the elbows and Tee's to customize your soaker hose layout.
The fittings are cheaper if you buy in bulk!