$ git clone -n https://src.fedoraproject.org/rpms/flexiblas.git /var/lib/mock/f41-build-815628-149638/root/chroot_tmpdir/scmroot/flexiblas
Cloning into '/var/lib/mock/f41-build-815628-149638/root/chroot_tmpdir/scmroot/flexiblas'...
$ git fetch origin cbc3863c65a4302868942066b9911011b4dabd2f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/flexiblas
 * [new ref]         cbc3863c65a4302868942066b9911011b4dabd2f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cbc3863 Update to 3.4.4