$ git clone -n https://src.fedoraproject.org/rpms/perl-Long-Jump.git /var/lib/mock/f40-build-2626359-65264/root/chroot_tmpdir/scmroot/perl-Long-Jump
Cloning into '/var/lib/mock/f40-build-2626359-65264/root/chroot_tmpdir/scmroot/perl-Long-Jump'...
$ git fetch origin 4f8977d4722e8754a34b7dc0a1aa0b3f4d99f3cc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Long-Jump
 * [new ref]         4f8977d4722e8754a34b7dc0a1aa0b3f4d99f3cc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4f8977d Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild