$ git clone -n https://src.fedoraproject.org/rpms/rust-sval_dynamic.git /var/lib/mock/f41-build-side-1-3134925-39764/root/chroot_tmpdir/scmroot/rust-sval_dynamic
Cloning into '/var/lib/mock/f41-build-side-1-3134925-39764/root/chroot_tmpdir/scmroot/rust-sval_dynamic'...
$ git fetch origin cf39c9acb4b17d26015202d6341fcbfaa421cc9e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-sval_dynamic
 * [new ref]         cf39c9acb4b17d26015202d6341fcbfaa421cc9e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cf39c9a no longer needed