$ git clone -n https://src.fedoraproject.org/rpms/rust-copypasta.git /var/lib/mock/f39-build-1499634-34753/root/chroot_tmpdir/scmroot/rust-copypasta
Cloning into '/var/lib/mock/f39-build-1499634-34753/root/chroot_tmpdir/scmroot/rust-copypasta'...
$ git fetch origin ea08b0a66abdd11707435212dd692b958d639d13:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-copypasta
 * [new ref]         ea08b0a66abdd11707435212dd692b958d639d13 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ea08b0a Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild