$ git clone -n https://src.fedoraproject.org/rpms/slic3r.git /var/lib/mock/f41-build-side-1-2669986-28990/root/chroot_tmpdir/scmroot/slic3r
Cloning into '/var/lib/mock/f41-build-side-1-2669986-28990/root/chroot_tmpdir/scmroot/slic3r'...
$ git fetch origin 793ed2aefce67dc06a2733f3901211dd0beb4106:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/slic3r
 * [new ref]         793ed2aefce67dc06a2733f3901211dd0beb4106 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 793ed2a convert license to SPDX