$ git clone -n https://src.fedoraproject.org/rpms/pax.git /var/lib/mock/f45-build-21439-584/root/chroot_tmpdir/scmroot/pax
Cloning into '/var/lib/mock/f45-build-21439-584/root/chroot_tmpdir/scmroot/pax'...
$ git fetch origin ebed24d3689b091ef44a54650ae385ff23498766:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/pax
 * [new ref]         ebed24d3689b091ef44a54650ae385ff23498766 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ebed24d Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild