$ git clone -n https://src.fedoraproject.org/rpms/rubygem-prawn-icon.git /var/lib/mock/f40-build-2323193-58702/root/chroot_tmpdir/scmroot/rubygem-prawn-icon
Cloning into '/var/lib/mock/f40-build-2323193-58702/root/chroot_tmpdir/scmroot/rubygem-prawn-icon'...
$ git fetch origin 6731560383f37308cc2ef869c59884a80313ab0a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-prawn-icon
 * [new ref]         6731560383f37308cc2ef869c59884a80313ab0a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6731560 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild