$ git clone -n https://src.fedoraproject.org/rpms/rust-async-std.git /var/lib/mock/f45-build-40284-770/root/chroot_tmpdir/scmroot/rust-async-std
Cloning into '/var/lib/mock/f45-build-40284-770/root/chroot_tmpdir/scmroot/rust-async-std'...
$ git fetch origin 26275d8a472f852aebef0a1d94a7eb65c4869ceb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-async-std
 * [new ref]         26275d8a472f852aebef0a1d94a7eb65c4869ceb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 26275d8 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild