Inherited Task - double hashing the assets

[rajpan32]

Below inherited task, hash the assets file twice. help needed.
cacheBust: {
options: {
assets: ['assets/', '!assets/.jpg'],
baseDir: 'tmp/ignorePattern',
encoding: 'utf8',
length: 16,
algorithm: 'md5',
deleteOriginals: true
},
task1:{
files: [{
expand: true,
cwd: 'tmp/ignorePattern/',
src: ['ignorePattern.html']
}]
},
task2:{
files: [{
expand: true,
cwd: 'tmp/ignorePattern/',
src: ['ignorePattern1.html']
}]
}}