$ git clone -n https://src.fedoraproject.org/rpms/rust-want.git /var/lib/mock/f45-build-46131-831/root/chroot_tmpdir/scmroot/rust-want
Cloning into '/var/lib/mock/f45-build-46131-831/root/chroot_tmpdir/scmroot/rust-want'...
$ git fetch origin 25850ea380c0cc3cf007f3858324e13f614b5dda:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-want
 * [new ref]         25850ea380c0cc3cf007f3858324e13f614b5dda -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 25850ea Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild