$ git clone -n https://src.fedoraproject.org/rpms/rust-foreign-types-macros.git /var/lib/mock/f38-build-side-43-rust-devel-1415153-31454/root/chroot_tmpdir/scmroot/rust-foreign-types-macros
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1415153-31454/root/chroot_tmpdir/scmroot/rust-foreign-types-macros'...
$ git fetch origin 5711aa852d9107169daa3435d30c817220792bcd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-foreign-types-macros
 * [new ref]         5711aa852d9107169daa3435d30c817220792bcd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5711aa8 Update to version 0.2.3; Fixes RHBZ#2181899