$ git clone -n https://src.fedoraproject.org/rpms/rust-serde_derive_internals.git /var/lib/mock/f45-build-44852-818/root/chroot_tmpdir/scmroot/rust-serde_derive_internals
Cloning into '/var/lib/mock/f45-build-44852-818/root/chroot_tmpdir/scmroot/rust-serde_derive_internals'...
$ git fetch origin 43c0405cc635cdc4f08c6a3e9b85e6a5167a40e9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-serde_derive_internals
 * [new ref]         43c0405cc635cdc4f08c6a3e9b85e6a5167a40e9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 43c0405 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild