$ git clone -n https://src.fedoraproject.org/rpms/flint.git /var/lib/mock/f40-build-1996555-44031/root/chroot_tmpdir/scmroot/flint
Cloning into '/var/lib/mock/f40-build-1996555-44031/root/chroot_tmpdir/scmroot/flint'...
$ git fetch origin 49bd34a677ac90c7812464397215856aaf5cecc9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/flint
 * [new ref]         49bd34a677ac90c7812464397215856aaf5cecc9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 49bd34a Use a more reliable way of detecting CPU features