$ git clone -n https://src.fedoraproject.org/rpms/rust-unic-langid-impl.git /var/lib/mock/f45-build-45860-828/root/chroot_tmpdir/scmroot/rust-unic-langid-impl
Cloning into '/var/lib/mock/f45-build-45860-828/root/chroot_tmpdir/scmroot/rust-unic-langid-impl'...
$ git fetch origin 6a25aa57c07f0a4f48e2438ff5e5dd0fc17aa1ff:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-unic-langid-impl
 * [new ref]         6a25aa57c07f0a4f48e2438ff5e5dd0fc17aa1ff -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6a25aa5 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild