$ git clone -n https://src.fedoraproject.org/rpms/linux-system-roles.git /var/lib/mock/f41-build-side-1-3128398-39563/root/chroot_tmpdir/scmroot/linux-system-roles
Cloning into '/var/lib/mock/f41-build-side-1-3128398-39563/root/chroot_tmpdir/scmroot/linux-system-roles'...
$ git fetch origin c2ecbd8c5c0617d752e5bd876d7fd44e91c5833f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/linux-system-roles
 * [new ref]         c2ecbd8c5c0617d752e5bd876d7fd44e91c5833f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c2ecbd8 Update to 1.90.0 upstream release