fix: Show detached HEAD

[xhargh]

I noticed that a detached HEAD wasn't shown properly. Here is my try to fix it.

[love-linger]

• First, I do not understand why HEAD and tags are always filtered in git log command
• Second, I have not notice the difference behaviour between this PR and develop branch

[love-linger]

I noticed that a detached HEAD wasn't shown properly

[xhargh]

I was not clear enough, my change fixes when we have a HEAD detached from something, like this:

which was shown like this before:

[love-linger]

I see. Then you should only add it to the default options if no filter is specified, such as:

[love-linger]

By the way, without this PR, you can find it by enable --reflogs

[xhargh]

I think your version with adding HEAD if there are no filters is better.

I know about the reflog option, that is how I've even found the HEAD earlier. But in the reflog, there are other things that are not always of interest