$ git clone -n https://src.fedoraproject.org/rpms/flang.git /var/lib/mock/f38-build-side-42-init-devel-656183-26596/root/chroot_tmpdir/scmroot/flang
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-656183-26596/root/chroot_tmpdir/scmroot/flang'...
$ git fetch origin 98b06960c7b59b5ed059914f020b26bb6934a479:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/flang
 * [new ref]         98b06960c7b59b5ed059914f020b26bb6934a479 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 98b0696 Fix mlir header path