$ git clone -n https://src.fedoraproject.org/rpms/flang.git /var/lib/mock/f41-build-1020772-18018/root/chroot_tmpdir/scmroot/flang
Cloning into '/var/lib/mock/f41-build-1020772-18018/root/chroot_tmpdir/scmroot/flang'...
$ git fetch origin 27899c21ded598467cb880ce480b011da7c38b33:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/flang
 * [new ref]         27899c21ded598467cb880ce480b011da7c38b33 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 27899c2 18.1.7 Release