$ git clone -n https://src.fedoraproject.org/rpms/kde-filesystem.git /var/lib/mock/f40-build-2199657-51751/root/chroot_tmpdir/scmroot/kde-filesystem
Cloning into '/var/lib/mock/f40-build-2199657-51751/root/chroot_tmpdir/scmroot/kde-filesystem'...
$ git fetch origin 3cc17949d085bef5476638f2fbade0f19dbcea32:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kde-filesystem
 * [new ref]         3cc17949d085bef5476638f2fbade0f19dbcea32 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3cc1794 Restructure kde-filesystem