$ git clone -n https://src.fedoraproject.org/rpms/perl-CGI-FormBuilder.git /var/lib/mock/f39-build-1433856-31894/root/chroot_tmpdir/scmroot/perl-CGI-FormBuilder
Cloning into '/var/lib/mock/f39-build-1433856-31894/root/chroot_tmpdir/scmroot/perl-CGI-FormBuilder'...
$ git fetch origin 84b719b9de6458a667bcbb27d09c6d201495abf8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-CGI-FormBuilder
 * [new ref]         84b719b9de6458a667bcbb27d09c6d201495abf8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 84b719b Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild