$ git clone -n https://src.fedoraproject.org/rpms/rust-bufstream.git /var/lib/mock/f39-build-1526142-36059/root/chroot_tmpdir/scmroot/rust-bufstream
Cloning into '/var/lib/mock/f39-build-1526142-36059/root/chroot_tmpdir/scmroot/rust-bufstream'...
$ git fetch origin 11c2422f55ca67d6129083c7f446c223503fae9e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-bufstream
 * [new ref]         11c2422f55ca67d6129083c7f446c223503fae9e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 11c2422 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild