$ git clone -n https://src.fedoraproject.org/rpms/llvm14.git /var/lib/mock/f40-build-1507270-23890/root/chroot_tmpdir/scmroot/llvm14
Cloning into '/var/lib/mock/f40-build-1507270-23890/root/chroot_tmpdir/scmroot/llvm14'...
$ git fetch origin 823f03a0b1d290c1d162b1afcd56f94c67416dc1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/llvm14
 * [new ref]         823f03a0b1d290c1d162b1afcd56f94c67416dc1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 823f03a Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild