$ git clone -n https://src.fedoraproject.org/rpms/thunderbird.git /var/lib/mock/f33-build-502849-64335/root/chroot_tmpdir/scmroot/thunderbird
Cloning into '/var/lib/mock/f33-build-502849-64335/root/chroot_tmpdir/scmroot/thunderbird'...
$ git reset --hard c3cb08572fafaafbf229645ff3841151567ea543
HEAD is now at c3cb085 ExcludeArch s390x because of build problems