$ git clone -n https://git.centos.org/rpms/llvm /var/lib/mock/module-llvm-toolset-rhel8-8050020211202154934-b4937e53-build-164-238/root/chroot_tmpdir/scmroot/llvm
Cloning into '/var/lib/mock/module-llvm-toolset-rhel8-8050020211202154934-b4937e53-build-164-238/root/chroot_tmpdir/scmroot/llvm'...
$ git reset --hard 49a92e08777ab522488e0f38fb8164d057aeeb04
HEAD is now at 49a92e0 import llvm-12.0.1-2.module+el8.5.0+12488+254d2a07