Trim the ends off the rhubarb and cut them into four-inch (10 cm) pieces.
Soak the rhubarb in ice water for at least 30 minutes (up to an hour) to soften it up.
Prepare your canner, jars, and lids.
Drain the rhubarb in a colander and set it aside.
In a pot, combine ginger, cinnamon, sugar, cloves, salt, water, and vinegar.
Bring it all to a boil over medium heat, stirring occasionally until the salt and sugar are dissolved. Boil it for a minute, then reduce the heat and keep the liquid hot.
Working with one jar at a time, place a cinnamon stick and a slice of ginger into a hot jar, and discard the cloves.
Pack the rhubarb into the jar, leaving some room for the liquid.
Pour in the hot pickling liquid, leaving half an inch (about 1 cm) of headspace.
Remove any air bubbles, and adjust the headspace as needed by adding more hot pickling liquid.
Clean the rims and place the hot lids onto the jars. Screw the bands down until they're fingertip tight.
Load the jars into the canner and return it to a boil.
Process the jars for ten minutes, then turn off the heat. Remove the canner lid and let the jars sit in the water for five minutes.
Carefully remove the jars from the canner and place them on a towel-lined surface. Let them sit for 24 hours.
Check the seals, label, and store.