$ git clone -n https://src.fedoraproject.org/rpms/llvm.git /var/lib/mock/eln-build-side-110612-59041741-6570559/root/chroot_tmpdir/scmroot/llvm
Cloning into '/var/lib/mock/eln-build-side-110612-59041741-6570559/root/chroot_tmpdir/scmroot/llvm'...
$ git fetch origin dcef22670cdf3125cbe80941c6a05f83f8eaf7bb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/llvm
 * [new ref]         dcef22670cdf3125cbe80941c6a05f83f8eaf7bb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dcef226 Update to LLVM 20.1.3