$ git clone -n https://src.fedoraproject.org/rpms/fluent-bit.git /var/lib/mock/f41-build-837103-158977/root/chroot_tmpdir/scmroot/fluent-bit
Cloning into '/var/lib/mock/f41-build-837103-158977/root/chroot_tmpdir/scmroot/fluent-bit'...
$ git fetch origin 0d9a3734af3cc6939734d2b99c08db85ca478048:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fluent-bit
 * [new ref]         0d9a3734af3cc6939734d2b99c08db85ca478048 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0d9a373 Update Fluent Bit to 2.2.2