$ git clone -n https://src.fedoraproject.org/rpms/rubygem-net-ssh.git /var/lib/mock/f45-build-35087-693/root/chroot_tmpdir/scmroot/rubygem-net-ssh
Cloning into '/var/lib/mock/f45-build-35087-693/root/chroot_tmpdir/scmroot/rubygem-net-ssh'...
$ git fetch origin 12866d6ada0b48803c61fd02e797452146061720:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-net-ssh
 * [new ref]         12866d6ada0b48803c61fd02e797452146061720 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 12866d6 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild