$ git clone -n https://src.fedoraproject.org/rpms/libidn.git /var/lib/mock/f40-build-741299-110116/root/chroot_tmpdir/scmroot/libidn
Cloning into '/var/lib/mock/f40-build-741299-110116/root/chroot_tmpdir/scmroot/libidn'...
$ git fetch origin 17536d397cab7c7ce2b875d8b28ba2da0d1b1215:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libidn
 * [new ref]         17536d397cab7c7ce2b875d8b28ba2da0d1b1215 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 17536d3 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild