$ git clone -n https://src.fedoraproject.org/rpms/rust-gix-macros.git /var/lib/mock/f40-build-2036724-48053/root/chroot_tmpdir/scmroot/rust-gix-macros
Cloning into '/var/lib/mock/f40-build-2036724-48053/root/chroot_tmpdir/scmroot/rust-gix-macros'...
$ git fetch origin 58a96e2e6d54cd33541344fe790ee1d3b3540f08:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gix-macros
 * [new ref]         58a96e2e6d54cd33541344fe790ee1d3b3540f08 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 58a96e2 Initial package (rhbz#2241045)