$ git clone -n https://src.fedoraproject.org/rpms/perl-Sort-MergeSort.git /var/lib/mock/f39-build-1434895-31959/root/chroot_tmpdir/scmroot/perl-Sort-MergeSort
Cloning into '/var/lib/mock/f39-build-1434895-31959/root/chroot_tmpdir/scmroot/perl-Sort-MergeSort'...
$ git fetch origin e6cbdd0fb6cf88b16b5fa4467c8896c57e44bdef:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Sort-MergeSort
 * [new ref]         e6cbdd0fb6cf88b16b5fa4467c8896c57e44bdef -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e6cbdd0 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild