$ git clone -n https://src.fedoraproject.org/rpms/rust-futures-core.git /var/lib/mock/f38-build-side-43-rust-devel-1417855-31459/root/chroot_tmpdir/scmroot/rust-futures-core
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1417855-31459/root/chroot_tmpdir/scmroot/rust-futures-core'...
$ git fetch origin ae407c1371742faead8868385db83cd71f3d088f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-futures-core
 * [new ref]         ae407c1371742faead8868385db83cd71f3d088f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ae407c1 Update to version 0.3.28; Fixes RHBZ#2183269