$ git clone -n https://src.fedoraproject.org/rpms/rust-cvt.git /var/lib/mock/f45-build-41129-779/root/chroot_tmpdir/scmroot/rust-cvt
Cloning into '/var/lib/mock/f45-build-41129-779/root/chroot_tmpdir/scmroot/rust-cvt'...
$ git fetch origin dac9427ceb0925324717e562abfa3d5f7c50a8bc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-cvt
 * [new ref]         dac9427ceb0925324717e562abfa3d5f7c50a8bc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dac9427 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild