$ git clone -n https://src.fedoraproject.org/rpms/rust-vmm-sys-util.git /var/lib/mock/f40-build-2170630-51028/root/chroot_tmpdir/scmroot/rust-vmm-sys-util
Cloning into '/var/lib/mock/f40-build-2170630-51028/root/chroot_tmpdir/scmroot/rust-vmm-sys-util'...
$ git fetch origin f2ba96c664463fbda53191e0191feb3b7805c877:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-vmm-sys-util
 * [new ref]         f2ba96c664463fbda53191e0191feb3b7805c877 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f2ba96c Update to version 0.11.2; Fixes RHBZ#2239416