$ git clone -n https://src.fedoraproject.org/rpms/perl-IO-String.git /var/lib/mock/f40-build-2305225-57072/root/chroot_tmpdir/scmroot/perl-IO-String
Cloning into '/var/lib/mock/f40-build-2305225-57072/root/chroot_tmpdir/scmroot/perl-IO-String'...
$ git fetch origin 09f48f685c5f52bb1048c76469691e7af058de4f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-IO-String
 * [new ref]         09f48f685c5f52bb1048c76469691e7af058de4f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 09f48f6 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild