I want to rebuild blender 4.1 today, which I build a week ago, but the build is not available by git. Is there any reason for?

I want to rebuild blender 4.1 today, which I build a week ago, but the build is not available by git. Is there any reason for?

The 4.1 branch is main currently. See Process/Release Cycle - Blender Developer Wiki for more info.