$ git clone -n https://src.fedoraproject.org/rpms/cosmic-launcher.git /var/lib/mock/f45-build-39631-750/root/chroot_tmpdir/scmroot/cosmic-launcher
Cloning into '/var/lib/mock/f45-build-39631-750/root/chroot_tmpdir/scmroot/cosmic-launcher'...
$ git fetch origin 2d85de612031f7df7723a5377edd304a126bfc84:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cosmic-launcher
 * [new ref]         2d85de612031f7df7723a5377edd304a126bfc84 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2d85de6 Update to 1.6.0