$ git clone -n https://src.fedoraproject.org/rpms/rust-memsec.git /var/lib/mock/f45-build-43281-801/root/chroot_tmpdir/scmroot/rust-memsec
Cloning into '/var/lib/mock/f45-build-43281-801/root/chroot_tmpdir/scmroot/rust-memsec'...
$ git fetch origin f9abefb65ebdbd126aa031ac7c5a288b26ae9249:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-memsec
 * [new ref]         f9abefb65ebdbd126aa031ac7c5a288b26ae9249 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f9abefb Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild