$ git clone -n https://src.fedoraproject.org/rpms/rust-http-body.git /var/lib/mock/f45-build-42385-793/root/chroot_tmpdir/scmroot/rust-http-body
Cloning into '/var/lib/mock/f45-build-42385-793/root/chroot_tmpdir/scmroot/rust-http-body'...
$ git fetch origin b84f7b8729c71206584c6435ae0fae76b37bdd80:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-http-body
 * [new ref]         b84f7b8729c71206584c6435ae0fae76b37bdd80 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b84f7b8 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild