$ git clone -n https://src.fedoraproject.org/rpms/rust-atk.git /var/lib/mock/f38-build-side-43-rust-devel-1400555-31151/root/chroot_tmpdir/scmroot/rust-atk
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1400555-31151/root/chroot_tmpdir/scmroot/rust-atk'...
$ git fetch origin d66402c7ceab3fb4ca24d9ada73f3d1e8e5b824d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-atk
 * [new ref]         d66402c7ceab3fb4ca24d9ada73f3d1e8e5b824d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d66402c Update to version 0.18.0; Fixes RHBZ#2231724