$ git clone -n https://src.fedoraproject.org/rpms/thunderbird.git /var/lib/mock/f33-build-438404-63202/root/chroot_tmpdir/scmroot/thunderbird
Cloning into '/var/lib/mock/f33-build-438404-63202/root/chroot_tmpdir/scmroot/thunderbird'...
$ git reset --hard e3a8433c0dd3f3bf88d99173cb0e648cbaded528
HEAD is now at e3a8433 Update to 78.6.0 build1