Explain what the term 'amend commit' means in the Git version control system.

In Git, the term "amend commit" means modifying the last commit. It allows you to fix the commit message or add/change files in an already made commit without creating a new one. It is usually used if you forgot to add something or want to correct the description.

Example command:

git commit --amend

After execution, an editor will open for changing the commit message, and if changes were added to the index before, they will also be included in this commit.