$ git clone -n https://src.fedoraproject.org/rpms/rust-rustls0.22.git /var/lib/mock/f45-build-44610-815/root/chroot_tmpdir/scmroot/rust-rustls0.22
Cloning into '/var/lib/mock/f45-build-44610-815/root/chroot_tmpdir/scmroot/rust-rustls0.22'...
$ git fetch origin cf6c90804cf5fb7eb7eb2933a9d792f2cc8157b2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-rustls0.22
 * [new ref]         cf6c90804cf5fb7eb7eb2933a9d792f2cc8157b2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cf6c908 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild