$ git clone -n https://src.fedoraproject.org/rpms/rust-anstream.git /var/lib/mock/f45-bootstrap-166-106/root/chroot_tmpdir/scmroot/rust-anstream
Cloning into '/var/lib/mock/f45-bootstrap-166-106/root/chroot_tmpdir/scmroot/rust-anstream'...
$ git fetch origin d774961cca3c94801d9650b6d9ba4c003866f00f:KOJI_FETCH_HEAD
error: Server does not allow request for unadvertised object d774961cca3c94801d9650b6d9ba4c003866f00f
$ git reset --hard d774961cca3c94801d9650b6d9ba4c003866f00f
fatal: Could not parse object 'd774961cca3c94801d9650b6d9ba4c003866f00f'.