$ git clone -n https://src.fedoraproject.org/rpms/jaxb-stax-ex.git /var/lib/mock/f38-build-side-42-init-devel-784025-27947/root/chroot_tmpdir/scmroot/jaxb-stax-ex
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-784025-27947/root/chroot_tmpdir/scmroot/jaxb-stax-ex'...
$ git fetch origin ae3dffd8efa04261fd2183ac10085efc3e7ff2c4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/jaxb-stax-ex
 * [new ref]         ae3dffd8efa04261fd2183ac10085efc3e7ff2c4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ae3dffd Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild