$ git clone -n https://src.fedoraproject.org/rpms/xml2.git /var/lib/mock/f40-build-796021-140456/root/chroot_tmpdir/scmroot/xml2
Cloning into '/var/lib/mock/f40-build-796021-140456/root/chroot_tmpdir/scmroot/xml2'...
$ git fetch origin 18a78578ca3cb88ef9688abe390da0483c0be825:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xml2
 * [new ref]         18a78578ca3cb88ef9688abe390da0483c0be825 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 18a7857 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild