$ git clone -n https://src.fedoraproject.org/rpms/flat-remix-icon-theme.git /var/lib/mock/f41-build-side-1-2635468-26123/root/chroot_tmpdir/scmroot/flat-remix-icon-theme
Cloning into '/var/lib/mock/f41-build-side-1-2635468-26123/root/chroot_tmpdir/scmroot/flat-remix-icon-theme'...
$ git fetch origin 3644e3e42d5b97db2937d76c11d4b552021c9cec:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/flat-remix-icon-theme
 * [new ref]         3644e3e42d5b97db2937d76c11d4b552021c9cec -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3644e3e convert license to SPDX