$ git clone -n https://src.fedoraproject.org/rpms/firefox.git /var/lib/mock/f37-build-657106-73177/root/chroot_tmpdir/scmroot/firefox
Cloning into '/var/lib/mock/f37-build-657106-73177/root/chroot_tmpdir/scmroot/firefox'...
$ git reset --hard 7b980b9542a07ae6b20942875102991c615b377d
HEAD is now at 7b980b9 Added fix for mozilla#1791856 / rhbz#2130087