$ git clone -n https://src.fedoraproject.org/rpms/rust-warp.git /var/lib/mock/f45-build-46141-831/root/chroot_tmpdir/scmroot/rust-warp
Cloning into '/var/lib/mock/f45-build-46141-831/root/chroot_tmpdir/scmroot/rust-warp'...
$ git fetch origin a316b2309c2658238304609f0bdb96c1d26f3dc0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-warp
 * [new ref]         a316b2309c2658238304609f0bdb96c1d26f3dc0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a316b23 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild