$ git clone -n https://src.fedoraproject.org/rpms/proxygen.git /var/lib/mock/f39-build-2554120-61951/root/chroot_tmpdir/scmroot/proxygen
Cloning into '/var/lib/mock/f39-build-2554120-61951/root/chroot_tmpdir/scmroot/proxygen'...
$ git fetch origin 3f95394d8ce3db3fc68a34ba5f4c7697ff3cf772:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/proxygen
 * [new ref]         3f95394d8ce3db3fc68a34ba5f4c7697ff3cf772 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3f95394 Update to 2023.10.16.00