$ git clone -n https://src.fedoraproject.org/rpms/flang.git /var/lib/mock/f38-build-side-42-init-devel-1136323-30373/root/chroot_tmpdir/scmroot/flang
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1136323-30373/root/chroot_tmpdir/scmroot/flang'...
$ git fetch origin a726b0fb715599b39b1081ba2e52efff6df3a929:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/flang
 * [new ref]         a726b0fb715599b39b1081ba2e52efff6df3a929 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a726b0f Update to LLVM 16.0.6