$ git clone -n https://src.fedoraproject.org/rpms/rust-darling_macro.git /var/lib/mock/f40-build-2091972-50255/root/chroot_tmpdir/scmroot/rust-darling_macro
Cloning into '/var/lib/mock/f40-build-2091972-50255/root/chroot_tmpdir/scmroot/rust-darling_macro'...
$ git fetch origin 838a2f962448fc1e92a267eecc93968149a0f663:KOJI_FETCH_HEAD
fatal: unable to access 'https://src.fedoraproject.org/rpms/rust-darling_macro.git/': Transferred a partial file
$ git reset --hard 838a2f962448fc1e92a267eecc93968149a0f663
HEAD is now at 838a2f9 Update to version 0.20.3; Fixes RHBZ#2190305