$ git clone -n https://src.fedoraproject.org/rpms/perl-Hash-FieldHash.git /var/lib/mock/f40-build-778187-129801/root/chroot_tmpdir/scmroot/perl-Hash-FieldHash
Cloning into '/var/lib/mock/f40-build-778187-129801/root/chroot_tmpdir/scmroot/perl-Hash-FieldHash'...
$ git fetch origin 791b78807c3b42afde1e48c18df9658d2eb18d5d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Hash-FieldHash
 * [new ref]         791b78807c3b42afde1e48c18df9658d2eb18d5d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 791b788 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild