$ git clone -n https://src.fedoraproject.org/rpms/rust-clap_builder.git /var/lib/mock/f40-build-1697575-24518/root/chroot_tmpdir/scmroot/rust-clap_builder
Cloning into '/var/lib/mock/f40-build-1697575-24518/root/chroot_tmpdir/scmroot/rust-clap_builder'...
$ git fetch origin d8012974e7de71f2867d5a7c675a9ed73bfa07a3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-clap_builder
 * [new ref]         d8012974e7de71f2867d5a7c675a9ed73bfa07a3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d801297 Update to 4.5.9 (close RHBZ#2296423)