$ git clone -n https://src.fedoraproject.org/rpms/perl-BSON.git /var/lib/mock/f42-build-3182235-40950/root/chroot_tmpdir/scmroot/perl-BSON
Cloning into '/var/lib/mock/f42-build-3182235-40950/root/chroot_tmpdir/scmroot/perl-BSON'...
$ git fetch origin 536d917eb7eb81e2420964ba4410807f08f9d477:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-BSON
 * [new ref]         536d917eb7eb81e2420964ba4410807f08f9d477 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 536d917 Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild