$ git clone -n https://src.fedoraproject.org/rpms/rust-sdd.git /var/lib/mock/f42-build-side-1-3537733-46560/root/chroot_tmpdir/scmroot/rust-sdd
Cloning into '/var/lib/mock/f42-build-side-1-3537733-46560/root/chroot_tmpdir/scmroot/rust-sdd'...
$ git fetch origin 59d89e26da91688337f569297854dfece3be66f2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-sdd
 * [new ref]         59d89e26da91688337f569297854dfece3be66f2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 59d89e2 Update to version 3.0.8; Fixes RHBZ#2350948