Failed patch changed my Git Bash prompt, how do I revert it?

I tried to apply a patch using git am <my.patch, but it failed.

Now I'm getting this in Git Bash:

sashoalm@SASHOALM-PC /c/Workspace/MyProject (master|AM 1/1)

My prompt used to show:

sashoalm@SASHOALM-PC /c/Workspace/MyProject (master)

So something has been "left over" from the unsuccessful patch, how do I completely cancel it, and return to the old prompt?

You can abort the process:

git am --abort