$ git clone -n https://src.fedoraproject.org/rpms/rpm-ostree.git /var/lib/mock/f40-build-1183246-21996/root/chroot_tmpdir/scmroot/rpm-ostree
Cloning into '/var/lib/mock/f40-build-1183246-21996/root/chroot_tmpdir/scmroot/rpm-ostree'...
$ git fetch origin dca04ddbeb323142f934e202a619fed22d39e366:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rpm-ostree
 * [new ref]         dca04ddbeb323142f934e202a619fed22d39e366 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dca04dd Release 2024.6