$ git clone -n https://src.fedoraproject.org/rpms/potrace.git /var/lib/mock/f40-build-797680-141429/root/chroot_tmpdir/scmroot/potrace
Cloning into '/var/lib/mock/f40-build-797680-141429/root/chroot_tmpdir/scmroot/potrace'...
$ git fetch origin e17bb74fc1251d62a11545e6d3389cbe850276c4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/potrace
 * [new ref]         e17bb74fc1251d62a11545e6d3389cbe850276c4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e17bb74 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild