$ git clone -n https://src.fedoraproject.org/rpms/rust-vhost.git /var/lib/mock/f39-build-2223210-52722/root/chroot_tmpdir/scmroot/rust-vhost
Cloning into '/var/lib/mock/f39-build-2223210-52722/root/chroot_tmpdir/scmroot/rust-vhost'...
$ git fetch origin 4354814cce8f4da044b16d6fc5ed8b7b00cadc0f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-vhost
 * [new ref]         4354814cce8f4da044b16d6fc5ed8b7b00cadc0f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4354814 Update to version 0.9.0; Fixes RHBZ#2248535