$ git clone -n https://src.fedoraproject.org/rpms/rust-virtio-vsock.git /var/lib/mock/f41-build-3150409-40538/root/chroot_tmpdir/scmroot/rust-virtio-vsock
Cloning into '/var/lib/mock/f41-build-3150409-40538/root/chroot_tmpdir/scmroot/rust-virtio-vsock'...
$ git fetch origin f77c1fa0f59e80373c5bdc5983c400411ef6a7f5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-virtio-vsock
 * [new ref]         f77c1fa0f59e80373c5bdc5983c400411ef6a7f5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f77c1fa Update to version 0.8.0