$ git clone -n https://src.fedoraproject.org/rpms/rust-linux-raw-sys0.4.git /var/lib/mock/f45-build-43016-799/root/chroot_tmpdir/scmroot/rust-linux-raw-sys0.4
Cloning into '/var/lib/mock/f45-build-43016-799/root/chroot_tmpdir/scmroot/rust-linux-raw-sys0.4'...
$ git fetch origin 8229a867cdecb1eb8c80bd6d9ae931fa445f8a90:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-linux-raw-sys0.4
 * [new ref]         8229a867cdecb1eb8c80bd6d9ae931fa445f8a90 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8229a86 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild