$ git clone -n https://src.fedoraproject.org/rpms/docbook5-schemas.git /var/lib/mock/f40-build-2276790-55184/root/chroot_tmpdir/scmroot/docbook5-schemas
Cloning into '/var/lib/mock/f40-build-2276790-55184/root/chroot_tmpdir/scmroot/docbook5-schemas'...
$ git fetch origin aa7d4ff3223d3d93cb357a4675e079744eabbebf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/docbook5-schemas
 * [new ref]         aa7d4ff3223d3d93cb357a4675e079744eabbebf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at aa7d4ff Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild