$ git clone -n https://src.fedoraproject.org/rpms/supercollider.git /var/lib/mock/f41-build-side-1-2771373-32225/root/chroot_tmpdir/scmroot/supercollider
Cloning into '/var/lib/mock/f41-build-side-1-2771373-32225/root/chroot_tmpdir/scmroot/supercollider'...
$ git fetch origin e1e3ff7772388aabb6e16e59e04898673f249a57:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/supercollider
 * [new ref]         e1e3ff7772388aabb6e16e59e04898673f249a57 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e1e3ff7 convert GPLv2+ license to SPDX