$ git clone -n https://src.fedoraproject.org/rpms/rust-vhost-user-backend.git /var/lib/mock/f45-build-46074-830/root/chroot_tmpdir/scmroot/rust-vhost-user-backend
Cloning into '/var/lib/mock/f45-build-46074-830/root/chroot_tmpdir/scmroot/rust-vhost-user-backend'...
$ git fetch origin 723824b43f3e605a9f0d77b1c305b07bec905bde:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-vhost-user-backend
 * [new ref]         723824b43f3e605a9f0d77b1c305b07bec905bde -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 723824b Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild