$ git clone -n https://src.fedoraproject.org/rpms/rust-ambient-id.git /var/lib/mock/f45-build-40031-767/root/chroot_tmpdir/scmroot/rust-ambient-id
Cloning into '/var/lib/mock/f45-build-40031-767/root/chroot_tmpdir/scmroot/rust-ambient-id'...
$ git fetch origin 149d193a5d0bf8c878fc0628bacdd46a0ade680a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-ambient-id
 * [new ref]         149d193a5d0bf8c878fc0628bacdd46a0ade680a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 149d193 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild