$ git clone -n https://src.fedoraproject.org/rpms/zsh.git /var/lib/mock/f45-build-39395-734/root/chroot_tmpdir/scmroot/zsh
Cloning into '/var/lib/mock/f45-build-39395-734/root/chroot_tmpdir/scmroot/zsh'...
$ git fetch origin 4a2d5294300503e84cb349010b8358b9bb1dee7e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/zsh
 * [new ref]         4a2d5294300503e84cb349010b8358b9bb1dee7e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4a2d529 fix crash with bracketed-paste-magic and undo