$ git clone -n https://src.fedoraproject.org/rpms/rust-actix.git /var/lib/mock/f40-build-2639456-66360/root/chroot_tmpdir/scmroot/rust-actix
Cloning into '/var/lib/mock/f40-build-2639456-66360/root/chroot_tmpdir/scmroot/rust-actix'...
$ git fetch origin 9ddc3003fb68203a0195ce10811cf0fc9500c11d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-actix
 * [new ref]         9ddc3003fb68203a0195ce10811cf0fc9500c11d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9ddc300 Update to version 0.13.3; Fixes RHBZ#2263126