$ git clone -n https://src.fedoraproject.org/rpms/rubygem-asciidoctor-pdf.git /var/lib/mock/f40-build-2224095-52767/root/chroot_tmpdir/scmroot/rubygem-asciidoctor-pdf
Cloning into '/var/lib/mock/f40-build-2224095-52767/root/chroot_tmpdir/scmroot/rubygem-asciidoctor-pdf'...
$ git fetch origin 08494d01d543910165b9633119559e94873c5a40:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-asciidoctor-pdf
 * [new ref]         08494d01d543910165b9633119559e94873c5a40 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 08494d0 Bump to 2.3.9