$ git clone -n https://src.fedoraproject.org/rpms/slrn.git /var/lib/mock/f41-build-side-1-2669982-28990/root/chroot_tmpdir/scmroot/slrn
Cloning into '/var/lib/mock/f41-build-side-1-2669982-28990/root/chroot_tmpdir/scmroot/slrn'...
$ git fetch origin 6925a5b0aee917566fef42ea8845552b4ed0e60e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/slrn
 * [new ref]         6925a5b0aee917566fef42ea8845552b4ed0e60e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6925a5b convert GPLv2+ license to SPDX