$ git clone -n https://src.fedoraproject.org/rpms/rust-serial_test_derive1.git /var/lib/mock/f38-build-side-43-rust-devel-1418576-31459/root/chroot_tmpdir/scmroot/rust-serial_test_derive1
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1418576-31459/root/chroot_tmpdir/scmroot/rust-serial_test_derive1'...
$ git fetch origin 9b641d8fc0612f64b65705fd2c166b638a5cea76:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-serial_test_derive1
 * [new ref]         9b641d8fc0612f64b65705fd2c166b638a5cea76 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9b641d8 Initial import (serial_test_derive 1 compat package)