$ git clone -n https://src.fedoraproject.org/rpms/perl-true.git /var/lib/mock/f40-build-779129-130214/root/chroot_tmpdir/scmroot/perl-true
Cloning into '/var/lib/mock/f40-build-779129-130214/root/chroot_tmpdir/scmroot/perl-true'...
$ git fetch origin bf70d4c38a27994f46558d17c798e6504bcd03fb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-true
 * [new ref]         bf70d4c38a27994f46558d17c798e6504bcd03fb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bf70d4c Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild