$ git clone -n https://src.fedoraproject.org/rpms/llvm14.git /var/lib/mock/f39-build-2423532-60579/root/chroot_tmpdir/scmroot/llvm14
Cloning into '/var/lib/mock/f39-build-2423532-60579/root/chroot_tmpdir/scmroot/llvm14'...
$ git fetch origin 0e94f67ae557bf3cf2a8052c967fc543db052255:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/llvm14
 * [new ref]         0e94f67ae557bf3cf2a8052c967fc543db052255 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0e94f67 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild