$ git clone -n https://src.fedoraproject.org/rpms/rust-h2_0.3.git /var/lib/mock/f45-build-42240-791/root/chroot_tmpdir/scmroot/rust-h2_0.3
Cloning into '/var/lib/mock/f45-build-42240-791/root/chroot_tmpdir/scmroot/rust-h2_0.3'...
$ git fetch origin 8e5f58cae47c7ec33a80fdc56b5ffbb181d24f79:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-h2_0.3
 * [new ref]         8e5f58cae47c7ec33a80fdc56b5ffbb181d24f79 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8e5f58c Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild