IntelliJ: Change standard commit message
I fixed this by editing the .idea/workspace.xml in the following row:
<list default="true" readonly="true" id="..." name="Default" comment="CHANGE DEFAULT MESSAGE HERE">
Thanks to Bohuslav Burghardt for pointing out the correct file to edit.
Under "Version Control" and "Confirmation", you have a check button : "Clear initial commit message".
That might be a better solution in case you want to always have an empty text-field to input your commit message. Otherwise you can modify that file.
UPDATE IntelliJ Version:
IntelliJ IDEA 2018.3.5 (Ultimate Edition)
Build #IU-183.5912.21, built on February 26, 2019
macOS 10.14.3
Option Clear initial commit message
is now under Version Control
> Commit Dialog