$ git clone -n https://src.fedoraproject.org/rpms/rust-os_pipe0.9.git /var/lib/mock/f39-build-1522166-35892/root/chroot_tmpdir/scmroot/rust-os_pipe0.9
Cloning into '/var/lib/mock/f39-build-1522166-35892/root/chroot_tmpdir/scmroot/rust-os_pipe0.9'...
$ git fetch origin ca18524ed9c05d8fff0410c33e3e0c89a974bcb9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-os_pipe0.9
 * [new ref]         ca18524ed9c05d8fff0410c33e3e0c89a974bcb9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ca18524 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild