Simply untrue according to the article, but it's not like you bothered to even click the link, right?

Mobilisation would be voluntary and open only to certain categories of prisoners.

Among those not eligible to serve include those found guilty of sexual violence, killing two or more people, serious corruption and former high-ranking officials, Shuliak said.

Only prisoners with under three years left to serve on their sentence may apply, she said. Any prisoners who are mobilised would be granted parole rather than a pardon.

They're giving the option for prisoners to apply to be a part of defending Ukraine. They're not conscripting rapists to cannon fodder battalions or anything like that, ffs.