$ git clone -n https://src.fedoraproject.org/rpms/rust-serial_test_derive2.git /var/lib/mock/f45-build-44877-818/root/chroot_tmpdir/scmroot/rust-serial_test_derive2
Cloning into '/var/lib/mock/f45-build-44877-818/root/chroot_tmpdir/scmroot/rust-serial_test_derive2'...
$ git fetch origin 5f068f0957ad25309b8996a6e30b1e504c256ec8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-serial_test_derive2
 * [new ref]         5f068f0957ad25309b8996a6e30b1e504c256ec8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5f068f0 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild