$ git clone -n https://src.fedoraproject.org/rpms/rpm-git-tag-sort.git /var/lib/mock/f41-build-side-1-2824941-33352/root/chroot_tmpdir/scmroot/rpm-git-tag-sort
Cloning into '/var/lib/mock/f41-build-side-1-2824941-33352/root/chroot_tmpdir/scmroot/rpm-git-tag-sort'...
$ git fetch origin c1835fe541064fe3bfe47c52ce0d5ffabaa04a6c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rpm-git-tag-sort
 * [new ref]         c1835fe541064fe3bfe47c52ce0d5ffabaa04a6c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c1835fe convert GPLv2+ license to SPDX