$ git clone -n https://src.fedoraproject.org/rpms/opus.git /var/lib/mock/f39-build-1470200-33883/root/chroot_tmpdir/scmroot/opus
Cloning into '/var/lib/mock/f39-build-1470200-33883/root/chroot_tmpdir/scmroot/opus'...
$ git fetch origin b49a829d03510509d5ed1581ea1cadf3ed5e4959:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/opus
 * [new ref]         b49a829d03510509d5ed1581ea1cadf3ed5e4959 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b49a829 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild