$ git clone -n https://src.fedoraproject.org/rpms/rust-futures-macro.git /var/lib/mock/f38-build-side-43-rust-devel-1416613-31457/root/chroot_tmpdir/scmroot/rust-futures-macro
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1416613-31457/root/chroot_tmpdir/scmroot/rust-futures-macro'...
$ git fetch origin 9f0f1e125b7016ec5b4f84fdc13df9fb83eced34:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-futures-macro
 * [new ref]         9f0f1e125b7016ec5b4f84fdc13df9fb83eced34 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9f0f1e1 Update to version 0.3.28; Fixes RHBZ#2183272