$ git clone -n https://src.fedoraproject.org/rpms/rust-zerocopy.git /var/lib/mock/f39-build-1572704-37790/root/chroot_tmpdir/scmroot/rust-zerocopy
Cloning into '/var/lib/mock/f39-build-1572704-37790/root/chroot_tmpdir/scmroot/rust-zerocopy'...
$ git fetch origin 8450e7f72afa7a2417f8f695993166536e4f1a17:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-zerocopy
 * [new ref]         8450e7f72afa7a2417f8f695993166536e4f1a17 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8450e7f Update to version 0.7.16