$ git clone -n https://src.fedoraproject.org/rpms/rust-clang-sys.git /var/lib/mock/f40-build-2231488-53289/root/chroot_tmpdir/scmroot/rust-clang-sys
Cloning into '/var/lib/mock/f40-build-2231488-53289/root/chroot_tmpdir/scmroot/rust-clang-sys'...
$ git fetch origin b4859a3af6d47e50089e1d2ec2f8da6164e58b16:KOJI_FETCH_HEAD
fatal: unable to access 'https://src.fedoraproject.org/rpms/rust-clang-sys.git/': Transferred a partial file
$ git reset --hard b4859a3af6d47e50089e1d2ec2f8da6164e58b16
HEAD is now at b4859a3 Update to version 1.7.0; Fixes RHBZ#2256353