$ git clone -n https://src.fedoraproject.org/rpms/opus.git /var/lib/mock/f40-build-803355-144243/root/chroot_tmpdir/scmroot/opus
Cloning into '/var/lib/mock/f40-build-803355-144243/root/chroot_tmpdir/scmroot/opus'...
$ git fetch origin a17bd26f1d038f14845c330d611376de3333583b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/opus
 * [new ref]         a17bd26f1d038f14845c330d611376de3333583b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a17bd26 1.5.1