$ git clone -n https://src.fedoraproject.org/rpms/perl-XString.git /var/lib/mock/f40-build-778607-130009/root/chroot_tmpdir/scmroot/perl-XString
Cloning into '/var/lib/mock/f40-build-778607-130009/root/chroot_tmpdir/scmroot/perl-XString'...
$ git fetch origin d2e34b1bfe38062696d7939d9a19be79e48f5224:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-XString
 * [new ref]         d2e34b1bfe38062696d7939d9a19be79e48f5224 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d2e34b1 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild