$ git clone -n https://src.fedoraproject.org/rpms/perl-Config-Std.git /var/lib/mock/f39-build-1434975-31966/root/chroot_tmpdir/scmroot/perl-Config-Std
Cloning into '/var/lib/mock/f39-build-1434975-31966/root/chroot_tmpdir/scmroot/perl-Config-Std'...
$ git fetch origin 8c607aaeb43dcf9342d26aeaec6ea33c827e4719:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Config-Std
 * [new ref]         8c607aaeb43dcf9342d26aeaec6ea33c827e4719 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8c607aa Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild