$ git clone -n https://src.fedoraproject.org/rpms/rust-arboard.git /var/lib/mock/f40-build-2122359-50742/root/chroot_tmpdir/scmroot/rust-arboard
Cloning into '/var/lib/mock/f40-build-2122359-50742/root/chroot_tmpdir/scmroot/rust-arboard'...
$ git fetch origin d9524829b9a0e9b04ff6979691165b9cf39771b3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-arboard
 * [new ref]         d9524829b9a0e9b04ff6979691165b9cf39771b3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d952482 Update to version 3.2.1; Fixes RHBZ#2235572