$ git clone -n https://src.fedoraproject.org/rpms/rubygem-childprocess.git /var/lib/mock/f41-build-1764372-24721/root/chroot_tmpdir/scmroot/rubygem-childprocess
Cloning into '/var/lib/mock/f41-build-1764372-24721/root/chroot_tmpdir/scmroot/rubygem-childprocess'...
$ git fetch origin 6e8bd4e6a0db0f4dfb73842d648fad0de280aea8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-childprocess
 * [new ref]         6e8bd4e6a0db0f4dfb73842d648fad0de280aea8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6e8bd4e Rebuilt for https://fedoraproject.org/wiki/Fedora_41_Mass_Rebuild