Snapshot gcc-12-20210926 is now available on
  https://gcc.gnu.org/pub/gcc/snapshots/12-20210926/
and on various mirrors, see http://gcc.gnu.org/mirrors.html for details.

This snapshot has been generated from the GCC 12 git branch
with the following options: git://gcc.gnu.org/git/gcc.git branch master revision fe2771b291c2c7c0ac37b75ec5b160937524b60c

You'll find:

 gcc-12-20210926.tar.xz               Complete GCC

  SHA256=bf0225ac83a4c586221c0daa16583769e1bc9e67af9c5b0ebeee3b5f01b1117c
  SHA1=b114aef53b295018d4859f6f8598725800336ac7

Diffs from 12-20210919 are available in the diffs/ subdirectory.

When a particular snapshot is ready for public consumption the LATEST-12
link is updated and a message is sent to the gcc list.  Please do not use
a snapshot before it has been announced that way.