$ git clone -n https://src.fedoraproject.org/rpms/swift-lang.git /var/lib/mock/f33-build-204013-48221/root/chroot_tmpdir/scmroot/swift-lang
Cloning into '/var/lib/mock/f33-build-204013-48221/root/chroot_tmpdir/scmroot/swift-lang'...
$ git reset --hard 09a193b388f5479e4cf81fbf5846e54aa340a06b
HEAD is now at 09a193b Updated to Swift 5.2.3-RELEASE