$ git clone -n https://src.fedoraproject.org/rpms/rust-async-executor.git /var/lib/mock/f45-build-40262-770/root/chroot_tmpdir/scmroot/rust-async-executor
Cloning into '/var/lib/mock/f45-build-40262-770/root/chroot_tmpdir/scmroot/rust-async-executor'...
$ git fetch origin 8a78d0e8691b6ad57515d2d8e5bd89c2e20e2502:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-async-executor
 * [new ref]         8a78d0e8691b6ad57515d2d8e5bd89c2e20e2502 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8a78d0e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild