$ git clone -n https://src.fedoraproject.org/rpms/rust-serial_test_derive0.5.git /var/lib/mock/f40-build-2130925-50794/root/chroot_tmpdir/scmroot/rust-serial_test_derive0.5
Cloning into '/var/lib/mock/f40-build-2130925-50794/root/chroot_tmpdir/scmroot/rust-serial_test_derive0.5'...
$ git fetch origin 5eb398f0769922fc3aa98e0444a37410306f6ea7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-serial_test_derive0.5
 * [new ref]         5eb398f0769922fc3aa98e0444a37410306f6ea7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5eb398f Regenerate with rust2rpm v24