$ git clone -n https://src.fedoraproject.org/rpms/rust-dotenv.git /var/lib/mock/f45-build-41406-782/root/chroot_tmpdir/scmroot/rust-dotenv
Cloning into '/var/lib/mock/f45-build-41406-782/root/chroot_tmpdir/scmroot/rust-dotenv'...
$ git fetch origin b6481ea0ce6adda5135da180deb3bde620b1a914:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-dotenv
 * [new ref]         b6481ea0ce6adda5135da180deb3bde620b1a914 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b6481ea Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild