$ git clone -n https://src.fedoraproject.org/rpms/perl-Class-Std-Fast.git /var/lib/mock/f40-build-2015860-46121/root/chroot_tmpdir/scmroot/perl-Class-Std-Fast
Cloning into '/var/lib/mock/f40-build-2015860-46121/root/chroot_tmpdir/scmroot/perl-Class-Std-Fast'...
$ git fetch origin da80016ba97bdcb43025058ed39e31ee356ab624:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Class-Std-Fast
 * [new ref]         da80016ba97bdcb43025058ed39e31ee356ab624 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at da80016 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild