$ git clone -n https://src.fedoraproject.org/rpms/clibs-list.git /var/lib/mock/f40-build-2225991-52886/root/chroot_tmpdir/scmroot/clibs-list
Cloning into '/var/lib/mock/f40-build-2225991-52886/root/chroot_tmpdir/scmroot/clibs-list'...
$ git fetch origin 17e6b174617362393c128fb798770240cf57d4a1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/clibs-list
 * [new ref]         17e6b174617362393c128fb798770240cf57d4a1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 17e6b17 Fix C compatibility issue