$ git clone -n https://src.fedoraproject.org/rpms/rust-utf-8.git /var/lib/mock/f40-build-2654119-66905/root/chroot_tmpdir/scmroot/rust-utf-8
Cloning into '/var/lib/mock/f40-build-2654119-66905/root/chroot_tmpdir/scmroot/rust-utf-8'...
$ git fetch origin af7f2dfabf1a2148f027282a4b76fbcdb08f2bdb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-utf-8
 * [new ref]         af7f2dfabf1a2148f027282a4b76fbcdb08f2bdb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at af7f2df Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild