$ git clone -n https://src.fedoraproject.org/rpms/rust-zerocopy.git /var/lib/mock/f42-build-side-115325-61098976-6589020/root/chroot_tmpdir/scmroot/rust-zerocopy
Cloning into '/var/lib/mock/f42-build-side-115325-61098976-6589020/root/chroot_tmpdir/scmroot/rust-zerocopy'...
$ git fetch origin 00fdfe50c8173a0f126b29601bd102abfc3d9ae2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-zerocopy
 * [new ref]         00fdfe50c8173a0f126b29601bd102abfc3d9ae2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 00fdfe5 Update to version 0.8.26