$ git clone -n https://src.fedoraproject.org/rpms/rust-vm-memory.git /var/lib/mock/f41-build-873391-16165/root/chroot_tmpdir/scmroot/rust-vm-memory
Cloning into '/var/lib/mock/f41-build-873391-16165/root/chroot_tmpdir/scmroot/rust-vm-memory'...
$ git fetch origin 9b3a78b8bc30c0af0d8b90e6ac18b6081747edc1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-vm-memory
 * [new ref]         9b3a78b8bc30c0af0d8b90e6ac18b6081747edc1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9b3a78b Update to version 0.14.1; Fixes RHBZ#2268989