$ git clone -n https://src.fedoraproject.org/rpms/rust-vhost-user-backend.git /var/lib/mock/f41-build-side-1-3130591-39594/root/chroot_tmpdir/scmroot/rust-vhost-user-backend
Cloning into '/var/lib/mock/f41-build-side-1-3130591-39594/root/chroot_tmpdir/scmroot/rust-vhost-user-backend'...
$ git fetch origin 9196e01b8539b8e9dd3d37b2c60281239adbcb50:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-vhost-user-backend
 * [new ref]         9196e01b8539b8e9dd3d37b2c60281239adbcb50 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9196e01 Update to version 0.17.0; Fixes RHBZ#2269693