$ git clone -n https://src.fedoraproject.org/rpms/rust-snafu.git /var/lib/mock/f45-build-45061-820/root/chroot_tmpdir/scmroot/rust-snafu
Cloning into '/var/lib/mock/f45-build-45061-820/root/chroot_tmpdir/scmroot/rust-snafu'...
$ git fetch origin e659abf2b97ba00371a3274e323fbdb399c56f1e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-snafu
 * [new ref]         e659abf2b97ba00371a3274e323fbdb399c56f1e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e659abf Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild