$ git clone -n https://src.fedoraproject.org/rpms/rpm-ostree.git /var/lib/mock/f41-build-61011568-6587636/root/chroot_tmpdir/scmroot/rpm-ostree
Cloning into '/var/lib/mock/f41-build-61011568-6587636/root/chroot_tmpdir/scmroot/rpm-ostree'...
$ git fetch origin e1b1e2bf87dd34d17d2055b4dbdb9fc19b2c799e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rpm-ostree
 * [new ref]         e1b1e2bf87dd34d17d2055b4dbdb9fc19b2c799e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e1b1e2b Release v2025.9