$ git clone -n https://src.fedoraproject.org/rpms/swift-lang.git /var/lib/mock/f37-build-639935-71352/root/chroot_tmpdir/scmroot/swift-lang
Cloning into '/var/lib/mock/f37-build-639935-71352/root/chroot_tmpdir/scmroot/swift-lang'...
$ git reset --hard 3d9d21ee37634ced05b190a0056ce71af3809612
HEAD is now at 3d9d21e Had wrong package name