$ git clone -n https://src.fedoraproject.org/rpms/rust-z85.git /var/lib/mock/f40-build-2259744-54381/root/chroot_tmpdir/scmroot/rust-z85
Cloning into '/var/lib/mock/f40-build-2259744-54381/root/chroot_tmpdir/scmroot/rust-z85'...
$ git fetch origin 73dad3120bacd046b294e9f493b2ad98380bc20b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-z85
 * [new ref]         73dad3120bacd046b294e9f493b2ad98380bc20b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 73dad31 Regenerate with rust2rpm v24