$ git clone -n https://src.fedoraproject.org/rpms/timespan.git /var/lib/mock/f41-build-side-1-2670625-29060/root/chroot_tmpdir/scmroot/timespan
Cloning into '/var/lib/mock/f41-build-side-1-2670625-29060/root/chroot_tmpdir/scmroot/timespan'...
$ git fetch origin 9bdad438f31c624528488fbc184091a63aa942c1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/timespan
 * [new ref]         9bdad438f31c624528488fbc184091a63aa942c1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9bdad43 convert GPLv2+ license to SPDX