$ git clone -n https://src.fedoraproject.org/rpms/rust-tiny_http.git /var/lib/mock/f45-build-45503-823/root/chroot_tmpdir/scmroot/rust-tiny_http
Cloning into '/var/lib/mock/f45-build-45503-823/root/chroot_tmpdir/scmroot/rust-tiny_http'...
$ git fetch origin 06d4727b040ce6da2483550c0ae62f2b117e28f4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-tiny_http
 * [new ref]         06d4727b040ce6da2483550c0ae62f2b117e28f4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 06d4727 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild