$ git clone -n https://src.fedoraproject.org/rpms/rubygem-rdoc.git /var/lib/mock/f39-build-1499409-34744/root/chroot_tmpdir/scmroot/rubygem-rdoc
Cloning into '/var/lib/mock/f39-build-1499409-34744/root/chroot_tmpdir/scmroot/rubygem-rdoc'...
$ git fetch origin 95e729649ef8640daac261e236851e1cc1100a4b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-rdoc
 * [new ref]         95e729649ef8640daac261e236851e1cc1100a4b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 95e7296 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild