$ git clone -n https://src.fedoraproject.org/rpms/jupp.git /var/lib/mock/f42-build-3279355-41337/root/chroot_tmpdir/scmroot/jupp
Cloning into '/var/lib/mock/f42-build-3279355-41337/root/chroot_tmpdir/scmroot/jupp'...
$ git fetch origin 1be7613d6ac709e8ea4224fe17dd6610ec6cdbc3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/jupp
 * [new ref]         1be7613d6ac709e8ea4224fe17dd6610ec6cdbc3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1be7613 Work around C23 build failures using C11