$ git clone -n https://src.fedoraproject.org/rpms/rust-async-stream.git /var/lib/mock/f45-build-40288-770/root/chroot_tmpdir/scmroot/rust-async-stream
Cloning into '/var/lib/mock/f45-build-40288-770/root/chroot_tmpdir/scmroot/rust-async-stream'...
$ git fetch origin 8b41906c864aac77c97317b30c5925a2c8901e55:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-async-stream
 * [new ref]         8b41906c864aac77c97317b30c5925a2c8901e55 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8b41906 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild