$ git clone -n https://src.fedoraproject.org/rpms/rust-dotenvy.git /var/lib/mock/f45-build-41421-782/root/chroot_tmpdir/scmroot/rust-dotenvy
Cloning into '/var/lib/mock/f45-build-41421-782/root/chroot_tmpdir/scmroot/rust-dotenvy'...
$ git fetch origin 2801402c58eef8d0561c7e9bb1978b8858efb50f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-dotenvy
 * [new ref]         2801402c58eef8d0561c7e9bb1978b8858efb50f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2801402 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild