$ git clone -n https://src.fedoraproject.org/rpms/gnome-shell.git /var/lib/mock/f33-build-451654-63477/root/chroot_tmpdir/scmroot/gnome-shell
Cloning into '/var/lib/mock/f33-build-451654-63477/root/chroot_tmpdir/scmroot/gnome-shell'...
$ git reset --hard c570f57fe8daad7cda28cdf21f720b42624d83c4
HEAD is now at c570f57 Update to 3.38.3