$ git clone -n https://src.fedoraproject.org/rpms/rubygem-ruby-vips.git /var/lib/mock/f40-build-1780618-24818/root/chroot_tmpdir/scmroot/rubygem-ruby-vips
Cloning into '/var/lib/mock/f40-build-1780618-24818/root/chroot_tmpdir/scmroot/rubygem-ruby-vips'...
$ git fetch origin 3ff649ded5b7f80840b9b5840a356bc5fda7684a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-ruby-vips
 * [new ref]         3ff649ded5b7f80840b9b5840a356bc5fda7684a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3ff649d Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild