$ git clone -n https://src.fedoraproject.org/rpms/dex-autostart.git /var/lib/mock/f41-build-side-1-3133782-39701/root/chroot_tmpdir/scmroot/dex-autostart
Cloning into '/var/lib/mock/f41-build-side-1-3133782-39701/root/chroot_tmpdir/scmroot/dex-autostart'...
$ git fetch origin 04a6e3b1bfb337eb529803eea8b64d7a0be74324:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/dex-autostart
 * [new ref]         04a6e3b1bfb337eb529803eea8b64d7a0be74324 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 04a6e3b Update to 0.10.1