A Maya script snippet to reset geometry to rest pose after joints have moved

reset_skin_cluster.py

import pymel.core as pm

### SNIPPET Reset Skin Cluster ###
# This script can be used to reset geometry to its neutral rest pose
# after joints have been moved. Use it when making adjustments to your rig/skeleton.
# USAGE: 1. Select the geo 2. Run this script.

# Limitation: 
# Sometimes depending on your history, Maya may give an error and fail to reset the geo.
# Sometimes running it twice solves this... ¯\_( ツ )_/¯
# For more advanced cases, like resetting a single joint, see Cole O'Brien's script here:
# https://gist.github.com/obriencole11/cfb1545a61bbbaff23498f5f9042d0e3

oldSel = pm.selected()

for eachGeo in pm.selected():
    skinInputs = eachGeo.listHistory(interestLevel=1, type='skinCluster')
    # filters out a bug where if a geo has an FFD lattice which is skinned,
    # it finds the lattice skinCluster instead of your geometry.
    correctSkins = [
        skin for skin in skinInputs
        if eachGeo.name() in [sk.getTransform().name() for sk in skin.getGeometry()]
        ]
    for oSkin in correctSkins:        
        skinJointList = pm.listConnections(oSkin.matrix, t='joint')
        bindPose = pm.listConnections(skinJointList[0].name(), d=True, s=False, t='dagPose')
        if bindPose:
            if not (pm.referenceQuery(bindPose[0], inr=True)):
                pm.delete(bindPose[0])
        sourceGeo = pm.skinCluster(oSkin, q=True, g=True)[0]
        pm.skinCluster(oSkin, e=True, ubk=True)
        pm.skinCluster(skinJointList, sourceGeo, ibp=True, tsb=True)

pm.select(oldSel)