$ git clone -n https://src.fedoraproject.org/rpms/rust-copypasta.git /var/lib/mock/f38-build-side-43-rust-devel-1402966-31192/root/chroot_tmpdir/scmroot/rust-copypasta
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1402966-31192/root/chroot_tmpdir/scmroot/rust-copypasta'...
$ git fetch origin 7c7ccb44fd17905cd3c2c420d7a939c85662c69c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-copypasta
 * [new ref]         7c7ccb44fd17905cd3c2c420d7a939c85662c69c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7c7ccb4 Update to 0.8.2