$ git clone -n https://src.fedoraproject.org/rpms/libopusenc.git /var/lib/mock/f45-build-16713-490/root/chroot_tmpdir/scmroot/libopusenc
Cloning into '/var/lib/mock/f45-build-16713-490/root/chroot_tmpdir/scmroot/libopusenc'...
$ git fetch origin b455e23a85bfc7469f6d8d9ce6e92f1f84e6759c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libopusenc
 * [new ref]         b455e23a85bfc7469f6d8d9ce6e92f1f84e6759c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b455e23 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild