$ git clone -n https://src.fedoraproject.org/rpms/firefox.git /var/lib/mock/f33-build-205191-48280/root/chroot_tmpdir/scmroot/firefox
Cloning into '/var/lib/mock/f33-build-205191-48280/root/chroot_tmpdir/scmroot/firefox'...
$ git reset --hard c9d361caf9d5b62518ae5a28d554f3f039cf21f9
HEAD is now at c9d361c Updated to 76.0.1