$ git clone -n https://src.fedoraproject.org/rpms/rust-smartstring.git /var/lib/mock/f40-build-2083783-49964/root/chroot_tmpdir/scmroot/rust-smartstring
Cloning into '/var/lib/mock/f40-build-2083783-49964/root/chroot_tmpdir/scmroot/rust-smartstring'...
$ git fetch origin b61eb2bf85e6b7c2770623ed7909ef20722b9c20:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-smartstring
 * [new ref]         b61eb2bf85e6b7c2770623ed7909ef20722b9c20 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b61eb2b Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild