$ git clone -n https://src.fedoraproject.org/rpms/perl-Readonly-XS.git /var/lib/mock/f40-build-778699-130066/root/chroot_tmpdir/scmroot/perl-Readonly-XS
Cloning into '/var/lib/mock/f40-build-778699-130066/root/chroot_tmpdir/scmroot/perl-Readonly-XS'...
$ git fetch origin c2806e1a52360304e949499242e71873c20d3359:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Readonly-XS
 * [new ref]         c2806e1a52360304e949499242e71873c20d3359 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c2806e1 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild