$ git clone -n https://src.fedoraproject.org/rpms/llvm11.git /var/lib/mock/f38-build-719854-97310/root/chroot_tmpdir/scmroot/llvm11
Cloning into '/var/lib/mock/f38-build-719854-97310/root/chroot_tmpdir/scmroot/llvm11'...
$ git fetch origin 7059dfbe0bbd95e05a6b5120f79331632aee8ce2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/llvm11
 * [new ref]         7059dfbe0bbd95e05a6b5120f79331632aee8ce2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7059dfb Add typename patch to fix test failures