$ git clone -n https://src.fedoraproject.org/rpms/flang.git /var/lib/mock/f39-build-1813340-41836/root/chroot_tmpdir/scmroot/flang
Cloning into '/var/lib/mock/f39-build-1813340-41836/root/chroot_tmpdir/scmroot/flang'...
$ git fetch origin 41b294d14f40520290b00859a537ab3adbba87a3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/flang
 * [new ref]         41b294d14f40520290b00859a537ab3adbba87a3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 41b294d Update to LLVM 17.0.4